Add ruby_2_3 branch to .travis.yml
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@53297 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Add ruby_2_3 branch to .travis.yml
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@53297 b2dd03c8-39d4-4d8f-98ff-823fe69b080e