diff --git a/demo/package-lock.json b/demo/package-lock.json
index 2182b18..ca66b22 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "asap": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.5.tgz",
-      "integrity": "sha1-UidltQw1EEkOUtfc/ghe+bqWlY8="
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
     },
     "core-js": {
       "version": "1.2.7",
@@ -15,27 +15,35 @@
       "integrity": "sha1-ZSKUwUZR2yj6k70tX/KYOk8IxjY="
     },
     "create-react-class": {
-      "version": "15.6.0",
-      "resolved": "https://registry.npmjs.org/create-react-class/-/create-react-class-15.6.0.tgz",
-      "integrity": "sha1-q0SEl8JlZuHilBPogyB9V8/nvtQ=",
+      "version": "15.7.0",
+      "resolved": "https://registry.npmjs.org/create-react-class/-/create-react-class-15.7.0.tgz",
+      "integrity": "sha512-QZv4sFWG9S5RUvkTYWbflxeZX+JG7Cz0Tn33rQBJ+WFQTqTfUTjMjiv9tnfXazjsO5r0KhPs+AqCjyrQX6h2ng==",
       "requires": {
-        "fbjs": "^0.8.9",
         "loose-envify": "^1.3.1",
         "object-assign": "^4.1.1"
       }
     },
     "encoding": {
-      "version": "0.1.12",
-      "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.12.tgz",
-      "integrity": "sha1-U4tm8+5izRq1HsMjgp0flIDHS+s=",
+      "version": "0.1.13",
+      "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.13.tgz",
+      "integrity": "sha512-ETBauow1T35Y/WZMkio9jiM0Z5xjHHmJ4XmjZOq1l/dXz3lr2sRn87nJy20RupqSh1F2m3HHPSp8ShIPQJrJ3A==",
       "requires": {
-        "iconv-lite": "~0.4.13"
+        "iconv-lite": "^0.6.2"
+      }
+    },
+    "faye-websocket": {
+      "version": "0.11.3",
+      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.11.3.tgz",
+      "integrity": "sha512-D2y4bovYpzziGgbHYtGCMjlJM36vAl/y+xUyn1C+FVx8szd1E+86KwVw6XvYSzOP8iMpm1X0I4xJD+QtUb36OA==",
+      "dev": true,
+      "requires": {
+        "websocket-driver": ">=0.5.1"
       }
     },
     "fbjs": {
-      "version": "0.8.12",
-      "resolved": "https://registry.npmjs.org/fbjs/-/fbjs-0.8.12.tgz",
-      "integrity": "sha1-ELXZL3bUVXX9Y6IX1OoCvqL47QQ=",
+      "version": "0.8.17",
+      "resolved": "https://registry.npmjs.org/fbjs/-/fbjs-0.8.17.tgz",
+      "integrity": "sha1-xNWY6taUkRJlPWWIsBpc3Nn5D90=",
       "requires": {
         "core-js": "^1.0.0",
         "isomorphic-fetch": "^2.1.1",
@@ -43,7 +51,7 @@
         "object-assign": "^4.1.0",
         "promise": "^7.1.1",
         "setimmediate": "^1.0.5",
-        "ua-parser-js": "^0.7.9"
+        "ua-parser-js": "^0.7.18"
       }
     },
     "fsevents": {
@@ -66,7 +74,8 @@
         "ansi-regex": {
           "version": "2.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ansi-styles": {
           "version": "2.2.1",
@@ -123,7 +132,8 @@
         "balanced-match": {
           "version": "0.4.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "bl": {
           "version": "1.1.2",
@@ -154,6 +164,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "~2.0.0"
           }
@@ -162,6 +173,7 @@
           "version": "2.10.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.x.x"
           }
@@ -170,6 +182,7 @@
           "version": "1.1.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^0.4.1",
             "concat-map": "0.0.1"
@@ -178,7 +191,8 @@
         "buffer-shims": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.11.0",
@@ -203,6 +217,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -211,6 +226,7 @@
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "delayed-stream": "~1.0.0"
           }
@@ -227,17 +243,20 @@
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
@@ -283,7 +302,8 @@
         "delayed-stream": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "delegates": {
           "version": "1.0.0",
@@ -315,7 +335,8 @@
         "extsprintf": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -337,12 +358,14 @@
         "fs.realpath": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "fstream": {
           "version": "1.0.10",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "graceful-fs": "^4.1.2",
             "inherits": "~2.0.0",
@@ -414,6 +437,7 @@
           "version": "7.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "^1.0.0",
             "inflight": "^1.0.4",
@@ -426,7 +450,8 @@
         "graceful-fs": {
           "version": "4.1.4",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "graceful-readlink": {
           "version": "1.0.1",
@@ -482,7 +507,8 @@
         "hoek": {
           "version": "2.16.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "http-signature": {
           "version": "1.1.1",
@@ -499,6 +525,7 @@
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "once": "^1.3.0",
             "wrappy": "1"
@@ -507,7 +534,8 @@
         "inherits": {
           "version": "2.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.4",
@@ -519,6 +547,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -550,7 +579,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -605,12 +635,14 @@
         "mime-db": {
           "version": "1.23.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "~1.23.0"
           }
@@ -619,6 +651,7 @@
           "version": "3.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.0.0"
           }
@@ -626,12 +659,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -689,7 +724,8 @@
         "number-is-nan": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "oauth-sign": {
           "version": "0.8.2",
@@ -707,6 +743,7 @@
           "version": "1.3.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -714,7 +751,8 @@
         "path-is-absolute": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "pinkie": {
           "version": "2.0.4",
@@ -734,7 +772,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "qs": {
           "version": "6.2.0",
@@ -766,6 +805,7 @@
           "version": "2.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "^1.0.0",
             "core-util-is": "~1.0.0",
@@ -809,6 +849,7 @@
           "version": "2.5.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "glob": "^7.0.5"
           }
@@ -868,6 +909,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -877,7 +919,8 @@
         "string_decoder": {
           "version": "0.10.31",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "stringstream": {
           "version": "0.0.5",
@@ -889,6 +932,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -909,6 +953,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "*",
             "fstream": "^1.0.2",
@@ -958,7 +1003,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "verror": {
           "version": "1.3.6",
@@ -981,7 +1027,8 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "xtend": {
           "version": "4.0.1",
@@ -996,10 +1043,19 @@
       "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.12.0.tgz",
       "integrity": "sha1-5tnb5Xy+/mB1HwKvM2GVhwyQwB4="
     },
+    "http-parser-js": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/http-parser-js/-/http-parser-js-0.5.3.tgz",
+      "integrity": "sha512-t7hjvef/5HEK7RWTdUzVUhl8zkEu+LlaE0IYzdMuvbSDipxBRpOn4Uhw8ZyECEa808iVT8XCjzo6xmYt4CiLZg==",
+      "dev": true
+    },
     "iconv-lite": {
-      "version": "0.4.18",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.18.tgz",
-      "integrity": "sha512-sr1ZQph3UwHTR0XftSbK85OvBbxe/abLGzEnPENCQwmHf7sck8Oyu4ob3LgBxWWxRoM+QszeUyl7jbqapu2TqA=="
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.2.tgz",
+      "integrity": "sha512-2y91h5OpQlolefMPmUlivelittSWy0rP+oYVpn6A7GwVHNE8AWzoYOBNmlwks3LobaJxgHCYZAnyNo2GgpNRNQ==",
+      "requires": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      }
     },
     "is-stream": {
       "version": "1.1.0",
@@ -1016,16 +1072,16 @@
       }
     },
     "js-tokens": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
-      "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
     },
     "loose-envify": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.3.1.tgz",
-      "integrity": "sha1-0aitM/qc4OcT1l/dCsi3SNR4yEg=",
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
+      "integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
       "requires": {
-        "js-tokens": "^3.0.0"
+        "js-tokens": "^3.0.0 || ^4.0.0"
       }
     },
     "nan": {
@@ -1036,9 +1092,9 @@
       "optional": true
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     "node-fetch": {
-      "version": "1.7.1",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.1.tgz",
-      "integrity": "sha512-j8XsFGCLw79vWXkZtMSmmLaOk9z5SQ9bV/tkbZVCqvgwzrjAGq66igobLofHtF63NvMTp2WjytpsNTGKa+XRIQ==",
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz",
+      "integrity": "sha512-NhZ4CsKx7cYm2vSrBAr2PvFOe6sWDf0UYLRqA6svUYg7+/TSfVAu49jYC4BvQ4Sms9SZgdqGBgroqfDhJdTyKQ==",
       "requires": {
         "encoding": "^0.1.11",
         "is-stream": "^1.0.1"
@@ -1058,35 +1114,34 @@
       }
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     "prop-types": {
-      "version": "15.5.10",
-      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.5.10.tgz",
-      "integrity": "sha1-J5ffwxJhguOpXj37suiT3ddFYVQ=",
+      "version": "15.7.2",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
+      "integrity": "sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==",
       "requires": {
-        "fbjs": "^0.8.9",
-        "loose-envify": "^1.3.1"
+        "loose-envify": "^1.4.0",
+        "object-assign": "^4.1.1",
+        "react-is": "^16.8.1"
       }
     },
     "react": {
-      "version": "15.6.1",
-      "resolved": "https://registry.npmjs.org/react/-/react-15.6.1.tgz",
-      "integrity": "sha1-uqhDTsZ4C96ZfNw4C3nNM7ljk98=",
+      "version": "16.14.0",
+      "resolved": "https://registry.npmjs.org/react/-/react-16.14.0.tgz",
+      "integrity": "sha512-0X2CImDkJGApiAlcf0ODKIneSwBPhqJawOa5wCtKbu7ZECrmS26NvtSILynQ66cgkT/RJ4LidJOc3bUESwmU8g==",
       "requires": {
-        "create-react-class": "^15.6.0",
-        "fbjs": "^0.8.9",
         "loose-envify": "^1.1.0",
-        "object-assign": "^4.1.0",
-        "prop-types": "^15.5.10"
+        "object-assign": "^4.1.1",
+        "prop-types": "^15.6.2"
       }
     },
     "react-dom": {
-      "version": "15.6.1",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-15.6.1.tgz",
-      "integrity": "sha1-LLDtQZEDjlPCCes6eaI+Kkz5lHA=",
+      "version": "16.14.0",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.14.0.tgz",
+      "integrity": "sha512-1gCeQXDLoIqMgqD3IO2Ah9bnf0w9kzhwN5q4FGnHZ67hBm9yePzB5JJAIQCc8x3pFnNlwFq4RidZggNAAkzWWw==",
       "requires": {
-        "fbjs": "^0.8.9",
         "loose-envify": "^1.1.0",
-        "object-assign": "^4.1.0",
-        "prop-types": "^15.5.10"
+        "object-assign": "^4.1.1",
+        "prop-types": "^15.6.2",
+        "scheduler": "^0.19.1"
       }
     },
     "react-highlight": {
@@ -1097,8 +1152,38 @@
         "highlight.js": "^9.6.0",
         "react": "^0.14.0 || ^15.0.0",
         "react-dom": "^0.14.0 || ^15.0.0"
+      },
+      "dependencies": {
+        "react": {
+          "version": "15.7.0",
+          "resolved": "https://registry.npmjs.org/react/-/react-15.7.0.tgz",
+          "integrity": "sha512-5/MMRYmpmM0sMTHGLossnJCrmXQIiJilD6y3YN3TzAwGFj6zdnMtFv6xmi65PHKRV+pehIHpT7oy67Sr6s9AHA==",
+          "requires": {
+            "create-react-class": "^15.6.0",
+            "fbjs": "^0.8.9",
+            "loose-envify": "^1.1.0",
+            "object-assign": "^4.1.0",
+            "prop-types": "^15.5.10"
+          }
+        },
+        "react-dom": {
+          "version": "15.7.0",
+          "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-15.7.0.tgz",
+          "integrity": "sha512-mpjXqC2t1FuYsILOLCj0kg6pbg460byZkVA/80VtDmKU/pYmoTdHOtaMcTRIDiyXLz4sIur0cQ04nOC6iGndJg==",
+          "requires": {
+            "fbjs": "^0.8.9",
+            "loose-envify": "^1.1.0",
+            "object-assign": "^4.1.0",
+            "prop-types": "^15.5.10"
+          }
+        }
       }
     },
+    "react-is": {
+      "version": "16.13.1",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
+      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ=="
+    },
     "react-scripts": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/react-scripts/-/react-scripts-0.6.1.tgz",
@@ -3010,7 +3095,8 @@
                 "ansi-regex": {
                   "version": "2.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "ansi-styles": {
                   "version": "2.2.1",
@@ -3067,7 +3153,8 @@
                 "balanced-match": {
                   "version": "0.4.2",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "bl": {
                   "version": "1.1.2",
@@ -3098,6 +3185,7 @@
                   "version": "0.0.9",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "inherits": "~2.0.0"
                   }
@@ -3106,6 +3194,7 @@
                   "version": "2.10.1",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "hoek": "2.x.x"
                   }
@@ -3114,6 +3203,7 @@
                   "version": "1.1.5",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "balanced-match": "^0.4.1",
                     "concat-map": "0.0.1"
@@ -3122,7 +3212,8 @@
                 "buffer-shims": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "caseless": {
                   "version": "0.11.0",
@@ -3147,6 +3238,7 @@
                   "version": "1.0.0",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "number-is-nan": "^1.0.0"
                   }
@@ -3155,6 +3247,7 @@
                   "version": "1.0.5",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "delayed-stream": "~1.0.0"
                   }
@@ -3171,17 +3264,20 @@
                 "concat-map": {
                   "version": "0.0.1",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "console-control-strings": {
                   "version": "1.1.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "core-util-is": {
                   "version": "1.0.2",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "cryptiles": {
                   "version": "2.0.5",
@@ -3227,7 +3323,8 @@
                 "delayed-stream": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "delegates": {
                   "version": "1.0.0",
@@ -3259,7 +3356,8 @@
                 "extsprintf": {
                   "version": "1.0.2",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "forever-agent": {
                   "version": "0.6.1",
@@ -3281,12 +3379,14 @@
                 "fs.realpath": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "fstream": {
                   "version": "1.0.10",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "graceful-fs": "^4.1.2",
                     "inherits": "~2.0.0",
@@ -3358,6 +3458,7 @@
                   "version": "7.0.5",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "fs.realpath": "^1.0.0",
                     "inflight": "^1.0.4",
@@ -3370,7 +3471,8 @@
                 "graceful-fs": {
                   "version": "4.1.4",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "graceful-readlink": {
                   "version": "1.0.1",
@@ -3426,7 +3528,8 @@
                 "hoek": {
                   "version": "2.16.3",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "http-signature": {
                   "version": "1.1.1",
@@ -3443,6 +3546,7 @@
                   "version": "1.0.5",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "once": "^1.3.0",
                     "wrappy": "1"
@@ -3451,7 +3555,8 @@
                 "inherits": {
                   "version": "2.0.1",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "ini": {
                   "version": "1.3.4",
@@ -3463,6 +3568,7 @@
                   "version": "1.0.0",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "number-is-nan": "^1.0.0"
                   }
@@ -3494,7 +3600,8 @@
                 "isarray": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "isstream": {
                   "version": "0.1.2",
@@ -3549,12 +3656,14 @@
                 "mime-db": {
                   "version": "1.23.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "mime-types": {
                   "version": "2.1.11",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "mime-db": "~1.23.0"
                   }
@@ -3563,6 +3672,7 @@
                   "version": "3.0.2",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "brace-expansion": "^1.0.0"
                   }
@@ -3570,12 +3680,14 @@
                 "minimist": {
                   "version": "0.0.8",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "mkdirp": {
                   "version": "0.5.1",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "minimist": "0.0.8"
                   }
@@ -3633,7 +3745,8 @@
                 "number-is-nan": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "oauth-sign": {
                   "version": "0.8.2",
@@ -3651,6 +3764,7 @@
                   "version": "1.3.3",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "wrappy": "1"
                   }
@@ -3658,7 +3772,8 @@
                 "path-is-absolute": {
                   "version": "1.0.0",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "pinkie": {
                   "version": "2.0.4",
@@ -3678,7 +3793,8 @@
                 "process-nextick-args": {
                   "version": "1.0.7",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "qs": {
                   "version": "6.2.0",
@@ -3710,6 +3826,7 @@
                   "version": "2.1.4",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "buffer-shims": "^1.0.0",
                     "core-util-is": "~1.0.0",
@@ -3753,6 +3870,7 @@
                   "version": "2.5.3",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "glob": "^7.0.5"
                   }
@@ -3812,6 +3930,7 @@
                   "version": "1.0.1",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "code-point-at": "^1.0.0",
                     "is-fullwidth-code-point": "^1.0.0",
@@ -3821,7 +3940,8 @@
                 "string_decoder": {
                   "version": "0.10.31",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "stringstream": {
                   "version": "0.0.5",
@@ -3833,6 +3953,7 @@
                   "version": "3.0.1",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "ansi-regex": "^2.0.0"
                   }
@@ -3853,6 +3974,7 @@
                   "version": "2.2.1",
                   "bundled": true,
                   "dev": true,
+                  "optional": true,
                   "requires": {
                     "block-stream": "*",
                     "fstream": "^1.0.2",
@@ -3902,7 +4024,8 @@
                 "util-deprecate": {
                   "version": "1.0.2",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "verror": {
                   "version": "1.3.6",
@@ -3925,7 +4048,8 @@
                 "wrappy": {
                   "version": "1.0.2",
                   "bundled": true,
-                  "dev": true
+                  "dev": true,
+                  "optional": true
                 },
                 "xtend": {
                   "version": "4.0.1",
@@ -5054,7 +5178,6 @@
         "faye-websocket": {
           "version": "0.10.0",
           "bundled": true,
-          "dev": true,
           "requires": {
             "websocket-driver": ">=0.5.1"
           }
@@ -8410,15 +8533,6 @@
             "hoek": "2.x.x"
           }
         },
-        "sockjs": {
-          "version": "0.3.18",
-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "faye-websocket": "^0.10.0",
-            "uuid": "^2.0.2"
-          }
-        },
         "sockjs-client": {
           "version": "1.1.1",
           "bundled": true,
@@ -8916,8 +9030,7 @@
         },
         "uuid": {
           "version": "2.0.3",
-          "bundled": true,
-          "dev": true
+          "bundled": true
         },
         "validate-npm-package-license": {
           "version": "3.0.1",
@@ -9087,15 +9200,13 @@
         "websocket-driver": {
           "version": "0.6.5",
           "bundled": true,
-          "dev": true,
           "requires": {
             "websocket-extensions": ">=0.1.1"
           }
         },
         "websocket-extensions": {
           "version": "0.1.1",
-          "bundled": true,
-          "dev": true
+          "bundled": true
         },
         "whatwg-fetch": {
           "version": "1.0.0",
@@ -9223,20 +9334,74 @@
         }
       }
     },
+    "safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "dev": true
+    },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
+    "scheduler": {
+      "version": "0.19.1",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.19.1.tgz",
+      "integrity": "sha512-n/zwRWRYSUj0/3g/otKDRPMh6qv2SYMWNq85IEa8iZyAv8od9zDYpGSnpBEjNgcMNq6Scbu5KfIPxNF72R/2EA==",
+      "requires": {
+        "loose-envify": "^1.1.0",
+        "object-assign": "^4.1.1"
+      }
+    },
     "setimmediate": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
       "integrity": "sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU="
     },
+    "sockjs": {
+      "version": "0.3.21",
+      "resolved": "https://registry.npmjs.org/sockjs/-/sockjs-0.3.21.tgz",
+      "integrity": "sha512-DhbPFGpxjc6Z3I+uX07Id5ZO2XwYsWOrYjaSeieES78cq+JaJvVe5q/m1uvjIQhXinhIeCFRH6JgXe+mvVMyXw==",
+      "dev": true,
+      "requires": {
+        "faye-websocket": "^0.11.3",
+        "uuid": "^3.4.0",
+        "websocket-driver": "^0.7.4"
+      }
+    },
     "ua-parser-js": {
-      "version": "0.7.13",
-      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.13.tgz",
-      "integrity": "sha1-zZ3S+GSTs/RNvu7zeA/adMXuFL4="
+      "version": "0.7.28",
+      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.28.tgz",
+      "integrity": "sha512-6Gurc1n//gjp9eQNXjD9O3M/sMwVtN5S8Lv9bvOYBfKfDNiIIhqiyi01vMBO45u4zkDE420w/e0se7Vs+sIg+g=="
+    },
+    "uuid": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+      "dev": true
+    },
+    "websocket-driver": {
+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.4.tgz",
+      "integrity": "sha512-b17KeDIQVjvb0ssuSDF2cYXSg2iztliJ4B9WdsuB6J952qCPKmnVq4DyW5motImXHDC1cBT/1UezrJVsKw5zjg==",
+      "dev": true,
+      "requires": {
+        "http-parser-js": ">=0.5.1",
+        "safe-buffer": ">=5.1.0",
+        "websocket-extensions": ">=0.1.1"
+      }
+    },
+    "websocket-extensions": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.4.tgz",
+      "integrity": "sha512-OqedPIGOfsDlo31UNwYbCFMSaO9m9G/0faIHj5/dZFDMFqPTcx6UwqyOy3COEaEOg/9VsGIpdqn62W5KhoKSpg==",
+      "dev": true
     },
     "whatwg-fetch": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz",
-      "integrity": "sha1-nITsLc9oGH/wC8ZOEnS0QhduHIQ="
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.2.tgz",
+      "integrity": "sha512-bJlen0FcuU/0EMLrdbJ7zOnW6ITZLrZMIarMUVmdKtsGvZna8vxKYaexICWPfZ8qwf9fzNq+UEIZrnSaApt6RA=="
     }
   }
 }
diff --git a/demo/yarn.lock b/demo/yarn.lock
index 8b4b8bb..a0b47bd 100644
--- a/demo/yarn.lock
+++ b/demo/yarn.lock
@@ -2041,9 +2041,9 @@ fastparse@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/fastparse/-/fastparse-1.1.1.tgz#d1e2643b38a94d7583b479060e6c4affc94071f8"
 
-faye-websocket@^0.10.0:
-  version "0.10.0"
-  resolved "https://registry.yarnpkg.com/faye-websocket/-/faye-websocket-0.10.0.tgz#4e492f8d04dfb6f89003507f6edbf2d501e7c6f4"
+faye-websocket@^0.11.3:
+  version "0.11.3"
+  resolved "https://registry.yarnpkg.com/faye-websocket/-/faye-websocket-0.11.3.tgz#5c0e9a8968e8912c286639fde977a8b209f2508e"
   dependencies:
     websocket-driver ">=0.5.1"
 
@@ -2490,6 +2490,10 @@ http-errors@~1.6.1:
     setprototypeof "1.0.3"
     statuses ">= 1.3.1 < 2"
 
+http-parser-js@>=0.5.1:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/http-parser-js/-/http-parser-js-0.5.3.tgz#01d2709c79d41698bb01d4decc5e9da4e4a033d9"
+
 http-proxy-middleware@0.17.1, http-proxy-middleware@~0.17.1:
   version "0.17.1"
   resolved "https://registry.yarnpkg.com/http-proxy-middleware/-/http-proxy-middleware-0.17.1.tgz#e2b847aa9962d8ce312cc82a3f443d5039cf197a"
@@ -4636,6 +4640,10 @@ rx-lite@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
 
+safe-buffer@>=5.1.0:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+
 safe-buffer@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
@@ -4777,11 +4785,12 @@ sockjs-client@1.0.3, sockjs-client@^1.0.3:
     url-parse "^1.0.1"
 
 sockjs@^0.3.15:
-  version "0.3.18"
-  resolved "https://registry.yarnpkg.com/sockjs/-/sockjs-0.3.18.tgz#d9b289316ca7df77595ef299e075f0f937eb4207"
+  version "0.3.21"
+  resolved "https://registry.yarnpkg.com/sockjs/-/sockjs-0.3.21.tgz#b34ffb98e796930b60a0cfa11904d6a339a7d417"
   dependencies:
-    faye-websocket "^0.10.0"
-    uuid "^2.0.2"
+    faye-websocket "^0.11.3"
+    uuid "^3.4.0"
+    websocket-driver "^0.7.4"
 
 sort-keys@^1.0.0:
   version "1.1.2"
@@ -5194,13 +5203,9 @@ utils-merge@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.0.tgz#0294fb922bb9375153541c4f7096231f287c8af8"
 
-uuid@^2.0.2:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-2.0.3.tgz#67e2e863797215530dff318e5bf9dcebfd47b21a"
-
-uuid@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.0.1.tgz#6544bba2dfda8c1cf17e629a3a305e2bb1fee6c1"
+uuid@^3.0.0, uuid@^3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.4.0.tgz#b23e4358afa8a202fe7a100af1f5f883f02007ee"
 
 validate-npm-package-license@^3.0.1:
   version "3.0.1"
@@ -5316,15 +5321,17 @@ webpack@1.13.2:
     watchpack "^0.2.1"
     webpack-core "~0.6.0"
 
-websocket-driver@>=0.3.6, websocket-driver@>=0.5.1:
-  version "0.6.5"
-  resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.6.5.tgz#5cb2556ceb85f4373c6d8238aa691c8454e13a36"
+websocket-driver@>=0.3.6, websocket-driver@>=0.5.1, websocket-driver@^0.7.4:
+  version "0.7.4"
+  resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.7.4.tgz#89ad5295bbf64b480abcba31e4953aca706f5760"
   dependencies:
+    http-parser-js ">=0.5.1"
+    safe-buffer ">=5.1.0"
     websocket-extensions ">=0.1.1"
 
 websocket-extensions@>=0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.1.tgz#76899499c184b6ef754377c2dbb0cd6cb55d29e7"
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.4.tgz#7f8473bc839dfd87608adb95d7eb075211578a42"
 
 whatwg-encoding@^1.0.1:
   version "1.0.1"