Updates rubocop to 0.80. (#780)

- next try to fix danger warning

Author: LeFnord

.rubocop.yml

@@ -33,3 +33,10 @@ Naming:
 
 Style/RegexpLiteral:
   Enabled: false
+
+Style/HashEachMethods:
+  Enabled: true
+Style/HashTransformKeys:
+  Enabled: true
+Style/HashTransformValues:
+  Enabled: true

CHANGELOG.md

@@ -45,10 +45,6 @@
 * [#743](https://github.com/ruby-grape/grape-swagger/pull/743): CI: use 2.4.6, 2.5.5 - [@olleolleolle](https://github.com/olleolleolle).
 * [#737](https://github.com/ruby-grape/grape-swagger/pull/737): Add swagger endpoint guard to both doc endpoints - [@urkle](https://github.com/urkle).
 
-#### Changes
-
-* [#749](https://github.com/ruby-grape/grape-swagger/pull/749) Drop support for Ruby 2.3 and below - [@LeFnord](https://github.com/LeFnord).
-
 
 ### 0.32.1 (December 7, 2018)
 

Gemfile

@@ -20,13 +20,13 @@ group :development, :test do
   gem 'pry', platforms: [:mri]
   gem 'pry-byebug', platforms: [:mri]
 
-  gem 'rack', '~> 2.1'
+  gem 'rack', '~> 2.2'
   gem 'rack-cors'
   gem 'rack-test'
   gem 'rake'
   gem 'rdoc'
   gem 'rspec', '~> 3.9'
-  gem 'rubocop', '~> 0.79', require: false
+  gem 'rubocop', '~> 0.80', require: false
 end
 
 group :test do