Allow twitter_cldr 4.x
Allow twitter_cldr 4.x

Has updated unicode information, and may be kept more up to date
with ruby 2.4 deprecations in the future. Should otherwise be
backwards compatible. https://github.com/twitter/twitter-cldr-rb/blob/master/CHANGELOG.md

I chose to keep allowing twitter_cldr 3.x too, for backwards compat,
in case there's an incompatible dependency somewhere. But an alternate
choice would be to allow only ~> 4.0.

pervino/solidus,pervino/solidus,pervino/solidus,pervino/solidus