feat(postalCode): add postal code for Peru

[rrbharath]

Add postal code validation for Peru

Addresses issue: #2757

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

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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7fdc788) to head (8fba37f).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2758   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2587      2587           
  Branches       656       656           
=========================================
  Hits          2587      2587           

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