Gemfile in in_threads-1.3.1 vs Gemfile in in_threads-1.4.0

@@ -1,3 +1,7 @@
 source 'https://rubygems.org'
 
 gemspec
+
+if RUBY_VERSION >= '2.0'
+  gem 'travis_check_rubies', '~> 0.2'
+end