Added support for Azerbaijani postal codes and mobile phones

[saidfagan]

Now isMobilePhone can validate Azerbaijani numbers and isPostalCode can validate Azerbaijani zip codes

Checklist

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

[saidfagan]

If I am not wrong, build failed due to some network or system errors.

[profnandaa]

LGTM, thanks for your contrib! 🎉

[codecov]

Codecov Report

Merging #1439 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1439   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           95        95           
  Lines         1254      1254           
=========================================
  Hits          1254      1254           

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

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