CI against AR 6.1

.github/workflows/main.yml

@@ -23,6 +23,7 @@ jobs:
           - '2.5'
           - 'jruby-9.2.17.0'
         gemfile:
+          - gemfiles/active_record_61.gemfile
           - gemfiles/active_record_60.gemfile
           - gemfiles/active_record_52.gemfile
           - gemfiles/active_record_51.gemfile

gemfiles/active_record_61.gemfile

@@ -0,0 +1,28 @@
+source 'https://rubygems.org'
+
+gem 'railties', '~> 6.1.0'
+gem 'activerecord', '~> 6.1.0', require: 'active_record'
+gem 'actionview', '~> 6.1.0', require: 'action_view'
+
+gem 'selenium-webdriver'
+
+platforms :ruby do
+  gem 'sqlite3', require: false
+  gem 'pg', require: false
+  gem 'mysql2', require: false
+end
+platforms :jruby do
+  gem 'activerecord-jdbcsqlite3-adapter', '>= 1.3.0'
+  gem 'activerecord-jdbcpostgresql-adapter', require: false
+  gem 'activerecord-jdbcmysql-adapter', require: false
+end
+if RUBY_ENGINE == 'rbx'
+  platforms :rbx do
+    gem 'rubysl', '~> 2.0'
+    gem 'racc'
+    gem 'minitest'
+    gem 'rubinius-developer_tools'
+  end
+end
+
+gemspec path: '../'