2.0.0

Added

• The command darker --config=check-darker.toml now runs Flake8, Mypy,
  pydocstyle, Pylint and Ruff on modified lines in Python files. Those tools are
  included in the [test] extra.
• The minimum Ruff version is now 0.0.292. Its configuration in pyproject.toml has
  been updated accordingly.
• The contribution guide now gives better instructions for reformatting and linting.
• Separate GitHub workflow for checking code formatting and import sorting.
• Also check the action, release tools and setup.py in the build workflows.
• Require Darkgraylib 1.0.x and Graylint 1.0.x.
• Update 3rd party GitHub actions to avoid using deprecated NodeJS versions.
• CI build now shows a diff between output of darker --help and its output as
  included README.rst in case the two differ.

Removed

• Drop support for Python 3.7 which has reached end of life.
• shlex_join compatibility wrapper for Python 3.7 and earlier.
• Move linting support to Graylint_ but keep the -L/--lint option for now.
• Move code used by both Darker and Graylint_ into the Darkgraylib_ library.
• Don't run pytest-darker_ in the CI build. It's lagging quite a bit behind.

Fixed

• Black 24.2.0 compatibility by using the new darkgraylib.files.find_project_root
  instead of the implementation in Black.
• Black 24.2.1 compatibility by detecting the new black.parsing.ASTSafetyError instead
  of AssertionError when Black>=24.2.1 is in use.
• Make sure NixOS_ builds have good SSL certificates installed.
• Work around some situations where Windows errors due to a too long Git command line.