Up Ruby Version Requirement
Up Ruby Version Requirement

I noticed that the .travis.yml file only tests Ruby versions 2.1.8,
2.2.4 and 2.3.0.

Ruby 2.3.0 is scheduled to be EOL status March of 2019 and 2.2 and 2.1
are already marked as EOL. I would suggest updating to at least 2.3 if
not newer in a new gem version.

freeformz/logglier