Update LICENSE.txt
Update README.md
update readme and requires
Unnecessary dependence on 'activesupport' gem removed
update dev deps, re-add activesupport
Arrays of hashes => KeyGroup<Key>
KeyGroup#to_a fix
missing_keys.rb: reformat
improve KeyGroup#merge
-kwargs
i18n_tasks -> i18n_task [ci skip]
New task! rake i18n:usages
require as per rails guides
doc i18n:usages
changelog for v0.2.20
Bump to 0.2.20
bump readme version
update readme
improve performance
base_scanner: CodeClimate smells