Bump webmock from 2.3.2 to 3.1.1

Bumps [webmock](https://github.com/bblimke/webmock) from 2.3.2 to 3.1.1.
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](bblimke/webmock@v2.3.2...v3.1.1)

Gemfile

@@ -41,5 +41,5 @@ group :test do
   gem 'capybara'
   gem 'mocha'
   gem 'poltergeist', require: false
-  gem 'webmock', '~> 2.3.0', require: false
+  gem 'webmock', '~> 3.1.1', require: false
 end

Gemfile.lock

@@ -295,7 +295,7 @@ GEM
       kgio (~> 2.6)
       rack
       raindrops (~> 0.7)
-    webmock (2.3.2)
+    webmock (3.1.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
@@ -346,7 +346,7 @@ DEPENDENCIES
   slimmer (~> 11.1.0)
   uglifier (>= 1.3.0)
   unicorn (= 4.8)
-  webmock (~> 2.3.0)
+  webmock (~> 3.1.1)
   wraith (~> 4.0)
 
 RUBY VERSION