We had typo'd using ClassSetReservedDoublePunctuator which was
resulting in a parse error for the regex:
([^\\:]+?)
With the 'v' flag set.
Co-Authored-By: Ali Mohammad Pur <mpfard@serenityos.org>
As LibRegex was not specified in TEST_DIRECTORIES, the existing
Tests/LibRegex subdirectory was not actually included during
configuration. Also the RegexLibC test has not been needed
since migration away from Serenitys LibC was done, so
that test has been fully removed. I also renamed the
Regex.cpp test to TestRegex.cpp to match the naming
convention of most test targets.
