feat(isAlpha, isAlphanumeric): add kazakh locale, kk-KZ

[BekStar7]

Hello!
I added Kazakh locale(kk-KZ) to isAlpha/isAlphanumeric.

Thanks in advance.

https://en.wikipedia.org/wiki/Kazakh_alphabets

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9ba1735) 99.95% compared to head (0558566) 99.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2226   +/-   ##
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  Coverage   99.95%   99.95%           
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  Files         107      107           
  Lines        2405     2405           
  Branches      604      604           
=======================================
  Hits         2404     2404           
  Partials        1        1           

Impacted Files	Coverage Δ
src/lib/alpha.js	100.00% <ø> (ø)

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[WikiRik]

Wikipedia mentions that multiple alphabets is used in Kazakhstan. Do you have some additional sources that show that this is the best approach?

[BekStar7]

Wikipedia mentions that multiple alphabets is used in Kazakhstan. Do you have some additional sources that show that this is the best approach?

At the moment, the Latin script has not yet been approved at the legislative level, it is under consideration. Most sites and applications are in Cyrillic.
https://egov.kz/cms/en/articles/culture/Alfavit-kazahskogo-yazyka-na-latinice
In Kazakhstan used Cyrillic:
https://www.ethnologue.com/language/kaz/

[profnandaa]

LGTM, thanks for the contrib! 🎉

[nurbek0298]

Hello @profnandaa!
I would like to request you to release the branch on npm. It includes significant updates that have been made to the project. It would be greatly appreciated if you could proceed with the release as soon as possible. Thank you in advance!