Release version 0.4.0

[Full Changelog](v0.3.0...v0.4.0)

Enhancements
------------

- Upgrade to Rubocop 0.58.x (Aaron Kromer, #10)
- Add more custom extra details for customized cops (Aaron Kromer, #10)
- Adjust common Rubocop configuration
  - Disable `Naming/BinaryOperatorParameterName` (Aaron Kromer, #7)
  - Disable `Style/RedundantReturn` (Aaron Kromer, #7)
  - Allow optional leading underscores for memoized instance variable names to
    support modules wanting to reduce conflicts / collisions. (Aaron Kromer, #10)
- Adjust common Rubocop Rails configuration (Aaron Kromer, #7)
  - Exclude Rails controllers from Rubocop's `Metrics/MethodLength` due to
    `respond_to` / `format` and permitted params methods
  - Disable `Rails/HasAndBelongsToMany`
  - Exclude Rails app `config/routes.rb` from `Metrics/BlockLength`

Bug Fixes
---------

- Add more functional methods to Rubocop config (Aaron Kromer, #7)
  - `create`
  - `create!`
  - `build`
  - `build!`
- Support running system specs in isolation (Aaron Kromer, #9)

CHANGELOG.md

@@ -1,6 +1,6 @@
-## Development
+## 0.4.0 (July 10, 2018)
 
-[Full Changelog](https://github.com/RadiusNetworks/radius-spec/compare/v0.3.0...master)
+[Full Changelog](https://github.com/RadiusNetworks/radius-spec/compare/v0.3.0...v0.4.0)
 
 ### Enhancements
 

lib/radius/spec/version.rb

@@ -2,6 +2,6 @@
 
 module Radius
   module Spec
-    VERSION = "0.4.pre"
+    VERSION = "0.4.0"
   end
 end