Fix test url

lib/mountebank/helper.rb

@@ -34,6 +34,6 @@ def call(environment)
   end
 
   if ::Faraday::Middleware.respond_to? :register_middleware
-    ::Faraday::Response.register_middleware :symbolize_keys => lambda { Mountebank::SymbolizeKeys }
+    ::Faraday::Response.register_middleware :symbolize_keys => Mountebank::SymbolizeKeys
   end
 end

lib/mountebank/network.rb

@@ -1,5 +1,4 @@
 require 'faraday'
-require 'faraday_middleware'
 
 module Mountebank
   class Network

mountebank.gemspec

@@ -18,11 +18,10 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency "faraday", "~>0.9.0"
-  spec.add_runtime_dependency "faraday_middleware"
-  spec.add_development_dependency "bundler", "~> 1.7"
-  spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "dotenv", "~> 1.0.0"
+  spec.add_runtime_dependency "faraday", "~>2.0.0"
+  spec.add_development_dependency "bundler", "~> 2.3"
+  spec.add_development_dependency "rake", "~> 13.0"
+  spec.add_development_dependency "dotenv", "~> 2.7.6"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "pry"
 end

spec/spec_helper.rb

@@ -9,7 +9,7 @@ def reset_mountebank
 end
 
 def test_url(uri)
-  open(uri).read
+  URI.open(uri).read
 end
 
 RSpec.configure do |config|