Bump flit from 2.2.0 to 3.3.0

[dependabot-preview]

Bumps flit from 2.2.0 to 3.3.0.

Changelog

Sourced from flit's changelog.

Release history

Version 3.3

• PKG-INFO files in sdists are now generated the same way as METADATA in wheels, fixing some issues with sdists (410).
• flit publish now sends SHA-256 hashes, fixing uploads to GitLab package repositories (416).
• The [project] metadata table from 621 is now fully supported and documented <pyproject_toml_project>. Projects using this can now specify requires = ["flit_core >=3.2,<4"] in the [build-system] table.

Version 3.2

• Experimental support for specifying metadata in a [project] table in pyproject.toml as specified by 621 (393). If you try using this, please specify requires = ["flit_core >=3.2.0,<3.3"] in the [build-system] table for now, in case it needs to change for the next release.
• Fix writing METADATA file with multi-line information in certain fields such as Author (402).
• Fix building wheel when a directory such as LICENSES appears in the project root directory (401).

Version 3.1

• Update handling of names & version numbers in wheel filenames and .dist-info folders in line with changes in the specs (395).
• Switch from the deprecated pytoml package to toml (378).
• Fix specifying backend-path in pyproject.toml for flit-core (as a list instead of a string).

Version 3.0

Breaking changes:

• Projects must now provide Flit with information in pyproject.toml files, not the older flit.ini format (338).
• flit_core once again requires Python 3 (>=3.4). Packages that support Python 2 can still be built by flit_core 2.x, but can't rely on new features (342).
• The deprecated flit installfrom command was removed (334). You can use pip install git+https://github.com/... instead.

Features and fixes:

• Fix building sdists from a git repository with non-ASCII characters in filenames (346).
• Fix identifying the version number when the code contains a subscript assignment before __version__ = (348).
• Script entry points can now use a class method (359).
• Set suitable permission bits on metadata files in wheels (256).
• Fixed line endings in the RECORD file when installing on Windows (368).
• Support for recording the source of local installations, as in 610 (335).
• flit init will check for a README in the root of the project and automatically set it as description-file (337).
• Pygments is not required for checking reStructuredText READMEs (357).
• Packages where the version number can be recognised without executing their code don't need their dependencies installed to build, which should make them build faster (361).
• Ensure the installed RECORD file is predictably ordered (366).

Version 2.3

• New projects created with init_cmd now declare that they require flit_core >=2,<4 (328). Any projects using pyproject.toml (not flit.ini) should be compatible with flit 3.x.

... (truncated)

Commits

• f6831de Version number -> 3.3.0
• fb21769 Prepare release notes for 3.3
• 82f1055 Merge pull request #423 from takluyver/doc-pep621
• 3f5255a Document version constraints for flit_core build dependency
• bc33d4d Flit now requires Python >=3.6
• b44fac4 Update 'flit init' to use PEP 621 [project] table
• 5f2d31d Add cross-reference to [tool.flit.module] section
• c7c8ebc Fix warning about duplicate target
• 58beed7 Start documenting PEP 621 support
• bdfd972 Python 3.3 & 3.4 no longer supported for Flit CLI
• Additional commits viewable in compare view

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