feat(isPassportNumber): fix regex for CN

[anirudhgiri]

Fixes #1686

The format for passport numbers for CN passports are as follows:

• Starts with either a "G" (for Ordinary) or an "E" (for Electronic)
• If it starts with "G", 8 numbers follow
• If it starts with "E" either 8 numbers follow, or a letter [A-Z] (except "I" or "O") and 7 numbers follow

Valid Examples:

• G12345678
• E12345678
• EA1234567

So the above conditions were implemented with the following regex : ^G\d{8}$|^E(?![IO])[A-Z0-9]\d{7}$

The appropriate testes were added to validators.js with all of them passing.

Checklist

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

[codecov]

Codecov Report

Merging #1714 (606c8cd) into master (8c4b3b3) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1714   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          101       101           
  Lines         2005      2005           
  Branches       452       452           
=========================================
  Hits          2005      2005           

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

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[anirudhgiri]

Bump!
It's been 48 hours since I opened the PR and no one has reviewed it. Just making sure 😄

[tux-tn]

Really sorry for the long delay @anirudhgiri ! Thank you for your PR 🎉
LGTM !

[profnandaa]

LGTM, thanks for your contrib! 🎉