Bump rack-cors from 0.4.0 to 0.4.1 (#2346)

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 0.4.0 to 0.4.1.
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG)
- [Commits](cyu/rack-cors@v0.4.0...v0.4.1)

I'll automatically resolve any conflicts with this PR as long as you don't alter it yourself.

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Gemfile

@@ -8,7 +8,7 @@ gem 'doorkeeper', '~> 3.0'
 gem 'doorkeeper-jwt', '~> 0.2.1'
 gem 'devise', '~> 3.0'
 gem 'versionist', '~> 1.5'
-gem 'rack-cors', '~> 0.3', require: 'rack/cors'
+gem 'rack-cors', '~> 0.4', require: 'rack/cors'
 gem 'restpack_serializer', github: "edpaget/restpack_serializer", branch: "dev" # REST API
 gem 'active_model_serializers', '0.10.0.rc2' # Event stream
 gem 'paper_trail', '~> 3.0'

Gemfile.lock

@@ -295,7 +295,7 @@ GEM
       pry (>= 0.9.11)
     puma (3.1.0)
     rack (1.6.8)
-    rack-cors (0.4.0)
+    rack-cors (0.4.1)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)
@@ -485,7 +485,7 @@ DEPENDENCIES
   pry-rails
   pry-stack_explorer
   puma (~> 3.1.0)
-  rack-cors (~> 0.3)
+  rack-cors (~> 0.4)
   rails (~> 4.2.8)
   ranked-model (~> 0.4.0)
   restpack_serializer!