✨ Support input masking four date formats

[cvializ]

This PR implements support for the following named masks to amp-inputmask:

• date-dd-mm-yyyy
  • Supports dd/mm/yyyy formatted dates
• date-mm-dd-yyyy
  • Supports mm/dd/yyyy formatted dates
• date-mm-yy
  • Supports mm/yy formatted dates
• date-yyyy-mm-dd
  • Supports ISO yyyy-mm-dd formatted dates

Known Issues

• deleting/inserting in the middle of the mask causes unexpected behavior

[nainar]

Names lgtm as documented in slack

[Gregable]

validator changes look good

[honeybadgerdontcare]

I don't believe it's necessary to repeat the pre and post amble for whitespaces for each named mask. Instead these new ones could be put with payment-card. Please verify with tests of course.

E.g.

        "([^\\s]+"          # One or more non-whitespace characters before
        "\\s"               # a single whitespace
        "(?:"               # non capturing group of one of the following:
        "date-dd-mm-yyyy|"  # a named mask or
        "date-mm-dd-yyyy|"  # a named mask or
        "date-mm-yy|"       # a named mask or
        "date-yyyy-mm-dd|"  # a named mask or
        "payment-card"      # a named mask
        ")"                 # end of non capturing group.
        "|"                 # Or (to cover the other case):
        "(?:"               # non capturing group of one of the following:
        "date-dd-mm-yyyy|"  # a named mask or
        "date-mm-dd-yyyy|"  # a named mask or
        "date-mm-yy|"       # a named mask or
        "date-yyyy-mm-dd|"  # a named mask or
	    "payment-card"      # a named mask
        ")"                 # end of non capturing group. Followed by:
	    "\\s"               # a single whitespace
	    "[^\\s]+)"          # followed by one or more non-whitespace characters.

I also noticed this does not catch the attribute value of payment-card date-dd-mm-yy. The single whitespace should become \\s+ # one or more whitespaces, followed by. Probably want to add a test case for this.

[cvializ]

Thanks for the suggestion, this should help prevent mistakes when adding future named masks. I'll make this change in a followup PR.

[honeybadgerdontcare]

Thanks! To be clear on the case it did not catch, the example has two whitespaces between payment-card and date-dd-mm-yyyy.