* matches
* added flags pass-through, and multiple function options; defaults to fullmatch
* move logic from validate to constructor
* cleaned up default args / fullmatch emulation
* fixed meta validator
* cleaned up default args / fullmatch emulation
* test cleanup
* versionadded tag
* added changelog entry
* cleaned up type checks, added to api docs and pyi type signature
* black formats
* black formatting
* 100% test coverage
* added example usage of matches_re to docs
* fixing py2 swallow type error and wrong quote in doctest
* explicit tests for all possible func args
* pragma no branch to get coverage 100%
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