feat(isMACAddress): add EUI-64 validation

[WikiRik]

This PR adds support for validating against EUI-64 as well as the previous EUI-48. This corresponds with the macaddr8 type in postgres.

Checklist

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

[codecov]

Codecov Report

Merging #1865 (5c398a4) into master (47ee5ad) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #1865   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          102       102           
  Lines         2059      2072   +13     
  Branches       464       472    +8     
=========================================
+ Hits          2059      2072   +13     

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

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[tux-tn]

Thank you for your PR @WikiRik !
Can you please address my comments?
I'm also wondering if EUI-48/64 is the most used technical term.Personally, I know it as MacAddr6 and MacAddr8.

[WikiRik]

To be honest, I do not really know. I would be happy to refer to it as MacAddr6 and 8. Do you think I should refactor it to numberOfBits? Or some other suggestion?

[tux-tn]

@WikiRik Looks like IEEE and IETF are using EUI-48 and EUI-64 terminology (RFC7043 as an example). I suggest we stick to that, we can add aliases later if community is complaining or suggesting another name.

[tux-tn]

LGTM 🎉 Thank you for your efforts @WikiRik !

[profnandaa]

LGTM, thanks for your contrib! 🎉