- reduce buildrequires to git-core

- Update to 0.22.0:
- Changes from 0.22.0:
* Macro definitions and tags gained a new valid attribute. A macro
definition/tag is considered valid if it doesn't appear in a
false branch of any condition appearing in the spec file.
- Changes from 0.21.0:
* specfile no longer tracebacks when some sources are missing and
can't be emulated. In such case the spec file is parsed without
them at the cost of %setup and %patch macros potentially
expanding differently than with the sources present.
* Specfile's license in RPM spec file is now confirmed to be SPDX
compatible.
- Blacklist a new broken test on spec file: test_parse_texlive_spec.
- Add a new Python module dependency: typing_extensions.
- Apply spec-cleaner.