Bump factory_girl_rails to ~> 4.6.0

Gemfile

@@ -260,10 +260,10 @@ group :development, :test do
   gem 'awesome_print', '~> 1.2.0', require: false
   gem 'fuubar', '~> 2.0.0'
 
-  gem 'database_cleaner', '~> 1.4.0'
-  gem 'factory_girl_rails', '~> 4.3.0'
-  gem 'rspec-rails',      '~> 3.3.0'
-  gem 'spinach-rails', '~> 0.2.1'
+  gem 'database_cleaner',   '~> 1.4.0'
+  gem 'factory_girl_rails', '~> 4.6.0'
+  gem 'rspec-rails',        '~> 3.3.0'
+  gem 'spinach-rails',      '~> 0.2.1'
 
   # Prevent occasions where minitest is not bundled in packaged versions of ruby (see #3826)
   gem 'minitest', '~> 5.7.0'

Gemfile.lock

@@ -194,10 +194,10 @@ GEM
     excon (0.45.4)
     execjs (2.6.0)
     expression_parser (0.9.0)
-    factory_girl (4.3.0)
+    factory_girl (4.5.0)
       activesupport (>= 3.0.0)
-    factory_girl_rails (4.3.0)
-      factory_girl (~> 4.3.0)
+    factory_girl_rails (4.6.0)
+      factory_girl (~> 4.5.0)
       railties (>= 3.0.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
@@ -916,7 +916,7 @@ DEPENDENCIES
   dropzonejs-rails (~> 0.7.1)
   email_reply_parser (~> 0.5.8)
   email_spec (~> 1.6.0)
-  factory_girl_rails (~> 4.3.0)
+  factory_girl_rails (~> 4.6.0)
   ffaker (~> 2.0.0)
   flay
   flog