Update webmock dependency

- Update to 3.x to support ruby 2.4

Gemfile.lock

@@ -6,7 +6,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.4.0)
+    addressable (2.5.1)
+      public_suffix (~> 2.0, >= 2.0.2)
     ast (2.3.0)
     builder (3.2.2)
     byebug (9.0.6)
@@ -26,7 +27,7 @@ GEM
       ffi (>= 1.3.0)
     ffi (1.9.14)
     gemcutter (0.7.1)
-    hashdiff (0.3.0)
+    hashdiff (0.3.2)
     json (2.0.1)
     method_source (0.8.2)
     multi_json (1.12.1)
@@ -43,6 +44,7 @@ GEM
     pry-doc (0.10.0)
       pry (~> 0.9)
       yard (~> 0.9)
+    public_suffix (2.0.5)
     rainbow (2.1.0)
     rake (11.2.2)
     redcarpet (3.3.4)
@@ -84,7 +86,7 @@ GEM
       ethon (>= 0.9.0)
     unicode-display_width (1.1.0)
     vcr (3.0.3)
-    webmock (2.1.0)
+    webmock (3.0.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
@@ -110,8 +112,8 @@ DEPENDENCIES
   simplecov (~> 0.12.0, >= 0.12.0)
   typhoeus (~> 1.1.0, >= 1.1.0)
   vcr (~> 3.0.3, >= 3.0.3)
-  webmock (~> 2.1.0, >= 2.1.0)
+  webmock (~> 3.0, >= 3.0)
   yard (~> 0.9.5, >= 0.9.5)
 
 BUNDLED WITH
-   1.14.3
+   1.14.6

circleci.gemspec

@@ -32,6 +32,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'simplecov',     '~> 0.12.0', '>= 0.12.0'
   s.add_development_dependency 'typhoeus',      '~> 1.1.0', '>= 1.1.0'
   s.add_development_dependency 'vcr',           '~> 3.0.3', '>= 3.0.3'
-  s.add_development_dependency 'webmock',       '~> 2.1.0', '>= 2.1.0'
+  s.add_development_dependency 'webmock',       '~> 3.0', '>= 3.0'
   s.add_development_dependency 'yard',          '~> 0.9.5', '>= 0.9.5'
 end