Consider adding WCAG tags with dots "wcag4.1.2" instead of "wcag412"

[WilcoFiers]

Add duplicate labels that have dots as separators to ensure that this is a non-breaking change

[straker]

A simple but tedious change. Just need to go through each rule metadata file and add a matching WCAG tag with dot separated numbers to each rule's tag array.

[jeeyyy]

PR merged. Closing issue.

[chandana7393]

Tested, one checkpoint is appearing twice one with decimal points and other without them in the Issue tags of the extension.

CC: @somaalapati
Tested Environment:
Axe-coconut - 4.0.0.29004v
Chrome - 77.0.3865.120v
OS - Windows 10 64 bit.

[WilcoFiers]

Closing this issue. This is unlikely to ever be necessary. The most likely SC where this could become ambiguous is if a 2.11.1 and a 2.1.11 ever get released. This is unlikely, as Principle 2 only has 5 guidelines (we would nave to get 6 new guidelines) and guideline 2.1 only has 4 success criterion. We'd need 6 new guidelines on 2.1, and 7 new success criteria on 2.1 for this to become an issue. Since there is already talk of WCAG 3.0, this is unlikely to be an issue for WCAG 2.