Remove support from Rails 4.0, 4.1 and 4.2

We won't support version less than Rails 5.0 anymore in Simple Form.

.travis.yml

@@ -10,9 +10,6 @@ rvm:
   - ruby-head
   - jruby-9.1.14.0
 gemfile:
-  - gemfiles/Gemfile.rails-4-0-stable
-  - gemfiles/Gemfile.rails-4-1-stable
-  - gemfiles/Gemfile.rails-4-2-stable
   - gemfiles/Gemfile.rails-5-0-stable
   - gemfiles/Gemfile.rails-5-1-stable
   - Gemfile
@@ -24,10 +21,6 @@ matrix:
       gemfile: Gemfile
     - rvm: 2.1.10
       gemfile: Gemfile
-    - rvm: 2.4.0
-      gemfile: gemfiles/Gemfile.rails-4-1-stable # activesupport 4.1 depends on json 1.8.3 which does not compile with Ruby 2.4.0
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile.rails-4-1-stable # activesupport 4.1 depends on json 1.8.3 which does not compile with Ruby 2.4.0
     - rvm: jruby-9.1.14.0
       gemfile: Gemfile
     - rvm: 1.9.3

gemfiles/Gemfile.rails-4-0-stable

@@ -1,17 +0,0 @@
-source 'https://rubygems.org'
-
-gemspec path: '..'
-
-platforms :rbx do
-  gem 'rubysl', '~> 2.0'
-  gem 'rubinius-developer_tools'
-end
-
-gem 'country_select', '~> 1.1.1'
-gem 'railties', github: 'rails/rails', branch: '4-0-stable'
-gem 'activemodel', github: 'rails/rails', branch: '4-0-stable'
-gem 'actionpack', github: 'rails/rails', branch: '4-0-stable'
-gem 'rake'
-gem 'tzinfo'
-gem 'rdoc'
-gem 'nokogiri', '~> 1.6.8'

gemfiles/Gemfile.rails-4-1-stable

@@ -1,16 +0,0 @@
-source 'https://rubygems.org'
-
-gemspec :path => '..'
-
-platforms :rbx do
-  gem 'rubysl', '~> 2.0'
-  gem 'rubinius-developer_tools'
-end
-
-gem 'country_select', '~> 1.1.1'
-gem 'railties', github: 'rails/rails', branch: '4-1-stable'
-gem 'activemodel', github: 'rails/rails', branch: '4-1-stable'
-gem 'actionpack', github: 'rails/rails', branch: '4-1-stable'
-gem 'rake'
-gem 'tzinfo'
-gem 'nokogiri', '~> 1.6.8'

gemfiles/Gemfile.rails-4-2-stable

@@ -1,16 +0,0 @@
-source 'https://rubygems.org'
-
-gemspec :path => '..'
-
-platforms :rbx do
-  gem 'rubysl', '~> 2.0'
-  gem 'rubinius-developer_tools'
-end
-
-gem 'country_select', '~> 1.1.1'
-gem 'railties', github: 'rails/rails', branch: '4-2-stable'
-gem 'activemodel', github: 'rails/rails', branch: '4-2-stable'
-gem 'actionpack', github: 'rails/rails', branch: '4-2-stable'
-gem 'rake'
-gem 'tzinfo'
-gem 'nokogiri', '~> 1.6.8'

lib/simple_form/components/maxlength.rb

@@ -28,19 +28,9 @@ module SimpleForm
         length_validator.options[:tokenizer]
       end
 
-      # Use validation with tokenizer if version of Rails is less than 5,
-      # if not validate without the tokenizer, if version is greater than Rails 4.
-      if ActionPack::VERSION::STRING < '5'
-        def maximum_length_value_from(length_validator)
-          if length_validator && !has_tokenizer?(length_validator)
-            length_validator.options[:is] || length_validator.options[:maximum]
-          end
-        end
-      elsif ActionPack::VERSION::STRING >= '5'
-        def maximum_length_value_from(length_validator)
-          if length_validator
-            length_validator.options[:is] || length_validator.options[:maximum]
-          end
+      def maximum_length_value_from(length_validator)
+        if length_validator
+          length_validator.options[:is] || length_validator.options[:maximum]
         end
       end
     end

lib/simple_form/components/minlength.rb

@@ -28,19 +28,9 @@ module SimpleForm
         length_validator.options[:tokenizer]
       end
 
-      # Use validation with tokenizer if version of Rails is less than 5,
-      # if not validate without the tokenizer, if version is greater than Rails 4.
-      if ActionPack::VERSION::STRING < '5'
-        def minimum_length_value_from(length_validator)
-          if length_validator && !has_tokenizer?(length_validator)
-            length_validator.options[:is] || length_validator.options[:minimum]
-          end
-        end
-      elsif ActionPack::VERSION::STRING >= '5'
-        def minimum_length_value_from(length_validator)
-          if length_validator
-            length_validator.options[:is] || length_validator.options[:minimum]
-          end
+      def minimum_length_value_from(length_validator)
+        if length_validator
+          length_validator.options[:is] || length_validator.options[:minimum]
         end
       end
     end

test/form_builder/wrapper_test.rb

@@ -264,8 +264,6 @@ class WrapperTest < ActionView::TestCase
   end
 
   test "input with aria attributes will merge with wrapper_options' aria" do
-    skip unless ActionPack::VERSION::MAJOR == '4' && ActionPack::VERSION::MINOR >= '2'
-
     swap_wrapper :default, custom_wrapper_with_input_aria_modal do
       with_concat_form_for @user do |f|
         concat f.input :name, input_html: { aria: { modal: 'another-aria', target: 'merge-aria' } }