Update gem's version

Author: tiagopog

README.md

@@ -59,13 +59,13 @@ Support:
 For Rails 4.x add this to your application's Gemfile:
 
 ```ruby
-gem 'jsonapi-utils', '~> 0.4.7'
+gem 'jsonapi-utils', '~> 0.4.8'
 ```
 
 For Rails 5, specify the `0.5.x` version in the Gemfile:
 
 ```ruby
-gem 'jsonapi-utils', '0.5.0'
+gem 'jsonapi-utils', '0.5.1'
 ```
 
 And then execute:

lib/jsonapi/utils/version.rb

@@ -1,5 +1,5 @@
 module JSONAPI
   module Utils
-    VERSION = '0.5.0'.freeze
+    VERSION = '0.5.1'.freeze
   end
 end