Stop testing against rails 5.0 (EoL)

.travis.yml

@@ -30,7 +30,6 @@ before_script:
 
 gemfile:
   - gemfiles/ar_4.2.gemfile
-  - gemfiles/ar_5.0.gemfile
   - gemfiles/ar_5.1.gemfile
   - gemfiles/ar_5.2.gemfile
 

Appraisals

@@ -14,11 +14,6 @@ appraise "ar-4.2" do
   gem "database_cleaner", "~> 1.6"
 end
 
-appraise "ar-5.0" do
-  gem "activerecord", "~> 5.0.6"
-  gem "rails-controller-testing"
-end
-
 appraise "ar-5.1" do
   gem "activerecord", "~> 5.1.5"
   gem "rails-controller-testing"

CHANGELOG.md

@@ -17,6 +17,12 @@ recommendations of [keepachangelog.com](http://keepachangelog.com/).
 
 - None
 
+### Other
+
+- Stop testing against rails 5.0, which reached EoL on 2018-04-15, when 5.2
+  was released, per the [rails maintenance
+  policy](http://guides.rubyonrails.org/maintenance_policy.html)
+
 ## 9.0.1 (2018-04-23)
 
 ### Breaking Changes

gemfiles/ar_5.0.gemfile

@@ -1,8 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "activerecord", "~> 5.0.6"
-gem "rails-controller-testing"
-
-gemspec path: "../"