It appears to be giving problems in TravisCI build due to the gem being outdated in terms of the supported ruby version listed there.
It doesn't seem that's been actively updated/maintained lately either.
Coverage decreased (-0.09%) to 97.676% when pulling fb088b8fc1b6a535725a8d9264dafb5c863477c1 on grzuy:remove_ruby_dep into 46a6adb29153253c4c2043f7e31dd7d091e17361 on guard:master.
It appears to be giving problems in TravisCI build due to the gem being outdated in terms of the supported ruby version listed there. It doesn't seem that's been actively updated/maintained lately either.