v0.5

• Remove the "module" infrastructure and implement parser functions as a replacement. This is not a 1-to-1 replacement, as #invoke is not implemented, but the APIs now exist in a sane way to implement any parser function.
• Basic support for subst and safesubst.
• Add a mwcomposerfromhell.parser_tests_parser module to read MediaWiki parser test files.
• Fix a bug ("Template loop detected") if the same unknown template appeared multiple times when decoding wikicode.
• Various internal improvements, including type hints and f-strings.
• Many minor bugs fixed and additional compatibility with MediaWiki.
• Changed packaging to use setuptools declarative config in setup.cfg.
• Support Python 3.10 and 3.11, drop support for Python 3.6.