Add ~490 IPv6 test cases with test/manyV6.test.ts

[richb-hanover]

This PR adds a manyV6.test.js file that includes ~490 test cases for IPV6 addresses.

A long time ago (2013), my company added IPv6 to our networking product. We produced a whole suite of test cases to check our IPv6 validation code. You can review the original at: https://github.com/richb-intermapper/IPv6-Regex/blob/master/test-ipv6-regex.pl

This PR translates the original perl code to Javascript. It prints "." for successful tests, and a diagnostic message where it fails.

GOOD NEWS: validator.js succeeds with no changes on all the tests

To run:

The new file sits in test and is called as part of npm test

Checklist

• [ x ] PR contains only changes related; no stray files, etc.
• [ N/A ] README updated (where applicable)
• [ x ] Tests written (where applicable)
• [ x ] 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 (6f436be) to head (657d207).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2602   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2536      2536           
  Branches       642       642           
=========================================
  Hits          2536      2536           

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