Remove support for Rails 4.1

.rubocop.yml

@@ -58,15 +58,12 @@ Style/DoubleNegation:
 Style/EmptyLines:
   Exclude:
     - 'lib/active_record_shards-3-2.rb'
-    - 'lib/active_record_shards-4-0.rb'
-    - 'lib/active_record_shards-4-1.rb'
     - 'lib/active_record_shards-5-0.rb'
 
 Style/FileName:
   Exclude:
     - 'lib/active_record_shards-3-2.rb'
-    - 'lib/active_record_shards-4-0.rb'
-    - 'lib/active_record_shards-4-1.rb'
+    - 'lib/active_record_shards-4-2.rb'
     - 'lib/active_record_shards-5-0.rb'
     - 'lib/active_record_shards/connection_switcher-4-0.rb'
     - 'lib/active_record_shards/connection_switcher-5-0.rb'

.travis.yml

@@ -5,7 +5,6 @@ rvm:
   - 2.4.0
 gemfile:
   - gemfiles/rails3.2.gemfile
-  - gemfiles/rails4.1.gemfile
   - gemfiles/rails4.2.gemfile
   - gemfiles/rails5.0.gemfile
   - gemfiles/rails5.1.gemfile
@@ -24,10 +23,6 @@ matrix:
   exclude:
     - rvm: 2.4.0
       gemfile: gemfiles/rails3.2.gemfile
-    - rvm: 2.4.0
-      gemfile: gemfiles/rails4.0.gemfile
-    - rvm: 2.4.0
-      gemfile: gemfiles/rails4.1.gemfile
     - rvm: 2.1.10
       gemfile: gemfiles/rails5.0.gemfile
     - rvm: 2.1.10

README.md

@@ -5,7 +5,7 @@
 ActiveRecord Shards is an extension for ActiveRecord that provides support for sharded database and slaves. Basically it is just a nice way to
 switch between database connections. We've made the implementation very small, and have tried not to reinvent any wheels already present in ActiveRecord.
 
-ActiveRecord Shards has been used and tested on Rails 3.2, 4.1, 4.2 and 5.0 and has in some form or another been used in production on a large Rails app for several years.
+ActiveRecord Shards has been used and tested on Rails 3.2, 4.2 and 5.0 and has in some form or another been used in production on a large Rails app for several years.
 
 ## Installation
 

lib/active_record_shards.rb

@@ -28,8 +28,8 @@ def self.rails_env
 case "#{ActiveRecord::VERSION::MAJOR}.#{ActiveRecord::VERSION::MINOR}"
 when '3.2'
   require 'active_record_shards-3-2'
-when '4.1', '4.2'
-  require 'active_record_shards-4-1'
+when '4.2'
+  require 'active_record_shards-4-2'
 when '5.0', '5.1'
   require 'active_record_shards-5-0'
 else

lib/active_record_shards/connection_switcher.rb

@@ -188,7 +188,7 @@ def method_missing(method, *args, &block) # rubocop:disable Style/MethodMissing
 end
 
 case "#{ActiveRecord::VERSION::MAJOR}.#{ActiveRecord::VERSION::MINOR}"
-when '3.2', '4.1', '4.2'
+when '3.2', '4.2'
   require 'active_record_shards/connection_switcher-4-0'
 when '5.0'
   require 'active_record_shards/connection_switcher-5-0'