diff --git a/package-lock.json b/package-lock.json
index 88a8c97..c9804cf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -88,7 +88,7 @@
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@@ -407,7 +407,7 @@
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-          "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
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@@ -786,7 +786,7 @@
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-      "resolved": "http://registry.npmjs.org/@types/node/-/node-8.9.5.tgz",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.9.5.tgz",
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-          "resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+          "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
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@@ -1297,7 +1297,7 @@
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-      "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
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-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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-      "resolved": "http://registry.npmjs.org/cacache/-/cacache-10.0.4.tgz",
+      "resolved": "https://registry.npmjs.org/cacache/-/cacache-10.0.4.tgz",
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@@ -2731,7 +2731,7 @@
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-          "resolved": "http://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
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@@ -2744,7 +2744,7 @@
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-              "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+              "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
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@@ -2918,18 +2918,32 @@
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-      "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
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-        "brorand": "^1.0.1",
+        "bn.js": "^4.11.9",
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-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0",
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+        "hmac-drbg": "^1.0.1",
+        "inherits": "^2.0.4",
+        "minimalistic-assert": "^1.0.1",
+        "minimalistic-crypto-utils": "^1.0.1"
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+          "dev": true
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+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+          "dev": true
+        }
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-          "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.2.0.tgz",
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@@ -3834,12 +3849,14 @@
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@@ -3854,17 +3871,20 @@
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@@ -3981,7 +4001,8 @@
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@@ -3993,6 +4014,7 @@
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@@ -4007,6 +4029,7 @@
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@@ -4014,12 +4037,14 @@
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@@ -4038,6 +4063,7 @@
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@@ -4118,7 +4144,8 @@
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@@ -4215,7 +4243,8 @@
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@@ -4251,6 +4280,7 @@
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@@ -4270,6 +4300,7 @@
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@@ -4313,12 +4344,14 @@
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+          "dev": true,
+          "optional": true
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-          "resolved": "http://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
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@@ -7832,6 +7876,7 @@
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@@ -7949,7 +7994,7 @@
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-          "resolved": "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
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