Drop support for ruby 1.9.3

Author: andrehjr

.travis.yml

@@ -1,6 +1,5 @@
 language: ruby
 rvm:
-  - 1.9.3
   - 2.0
   - 2.1.10
   - 2.2.2
@@ -18,14 +17,6 @@ gemfile:
 
 matrix:
   exclude:
-  - rvm: 1.9.3
-    gemfile: gemfiles/5.0.gemfile
-  - rvm: 1.9.3
-    gemfile: gemfiles/5.1.gemfile
-  - rvm: 1.9.3
-    gemfile: gemfiles/5.2.gemfile
-  - rvm: 1.9.3
-    gemfile: gemfiles/6.0.gemfile
   - rvm: 2.0
     gemfile: gemfiles/5.0.gemfile
   - rvm: 2.0

split.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
    "mailing_list_uri" => "https://groups.google.com/d/forum/split-ruby"
  }
 
-  s.required_ruby_version = '>= 1.9.3'
+  s.required_ruby_version = '>= 2.2.2'
   s.required_rubygems_version = '>= 2.0.0'
 
   s.files         = `git ls-files`.split("\n")