Bump supported Ruby versions to match Rails 5.

Author: kaspth

.travis.yml

@@ -21,13 +21,6 @@ gemfile:
 - gemfiles/rails_5.1.gemfile
 - gemfiles/rails_5.2.gemfile
 matrix:
-  include:
-  - rvm: 1.9.3
-    gemfile: gemfiles/rails_4.2.gemfile
-  - rvm: 2.0.0
-    gemfile: gemfiles/rails_4.2.gemfile
-  - rvm: 2.1.10
-    gemfile: gemfiles/rails_4.2.gemfile
   allow_failures:
   - rvm: rbx-2
   - rvm: jruby

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    globalid (0.4.2)
+    globalid (0.5.0)
       activesupport (>= 4.2.0)
 
 GEM

globalid.gemspec

@@ -1,11 +1,11 @@
 Gem::Specification.new do |s|
   s.platform    = Gem::Platform::RUBY
   s.name        = 'globalid'
-  s.version     = '0.4.2'
+  s.version     = '0.5.0'
   s.summary     = 'Refer to any model with a URI: gid://app/class/id'
   s.description = 'URIs for your models makes it easy to pass references around.'
 
-  s.required_ruby_version = '>= 1.9.3'
+  s.required_ruby_version = '>= 2.2.2'
 
   s.license = 'MIT'