Added Georgian locale (ka_GE)

[Lukakva]

Added translations for the Georgian language.

Although not very well known, Georgian is a unique language spoken only by the citizens of Republic of Georgia (for thousands of years).

I love your library, and since I had to create a Georgian locale for my use anyway, I thought I might as well create a PR.

Not a lot of libraries have Georgian translations, so your library will stand out even more now!

[coveralls]

Pull Request Test Coverage Report for Build 380

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.7%) to 29.476%

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Totals
Change from base Build 372:	-1.7%
Covered Lines:	85
Relevant Lines:	282

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💛 - Coveralls

[hustcc]

Thank you very much.

Please help to fill the testease of the locale.

[Lukakva]

@hustcc There seems to be no language tests in v4.0.0 branch. Should I commit a test file in the master branch?

[hustcc]

There has one test case of en.

[hustcc]

send pr to master, code is merged into master.

[Lukakva]

Running npm install didn't install jest-date-mock since it was not included in package.json, so I added it. I hope that's okay.

[hustcc]

Seem you pr to timeago.js on branch v4.0.0, you should change to master.

[Lukakva]

Will open a new pull request, sorry for the inconvenience.