removing ruby 2.3 and rails 4.0 and 4.1 official support

.travis.yml

@@ -9,12 +9,6 @@ bundler_args: --verbose
 
 matrix:
   include:
-    - rvm: "2.3.7"
-      gemfile: gemfiles/rails_4_0.gemfile
-    - rvm: "2.3.7"
-      gemfile: gemfiles/rails_4_1.gemfile
-    - rvm: "2.3.7"
-      gemfile: gemfiles/rails_4_2.gemfile
     - rvm: "2.4.6"
       gemfile: gemfiles/rails_4_2.gemfile
     - rvm: "2.5.5"

README.rdoc

@@ -5,7 +5,8 @@
 
 == Description
 
-Complete validation of dates, times and datetimes for Rails 4.x and ActiveModel.
+Complete validation of dates, times and datetimes for Rails 4.2.x and ActiveModel. Rails 4.0.x and 4.1.x may
+still work but official support has ended.
 
 If you a looking for the old version for Rails 3.x go here[http://github.com/adzap/validates_timeliness/tree/v3.x].
 

gemfiles/rails_4_0.gemfile

@@ -1,14 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rails", "~> 4.0.13"
-gem "rspec", "~> 3.6.0"
-gem "rspec-rails", "~> 3.6.0"
-gem "timecop"
-gem "byebug"
-gem "appraisal"
-gem "sqlite3", "~> 1.3.0"
-gem "nokogiri", "1.6.7"
-
-gemspec path: "../"

gemfiles/rails_4_1.gemfile

@@ -1,14 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rails", "~> 4.1.14"
-gem "rspec", "~> 3.6.0"
-gem "rspec-rails", "~> 3.6.0"
-gem "timecop"
-gem "byebug"
-gem "appraisal"
-gem "sqlite3", "~> 1.3.0"
-gem "nokogiri", "1.6.7"
-
-gemspec path: "../"