Bump flit-core from 2.3.0 to 3.7.1

[dependabot]

Bumps flit-core from 2.3.0 to 3.7.1.

Changelog

Sourced from flit-core's changelog.

Version 3.7.1

• Fix building packages which need execution to get the version number, and have a relative import in __init__.py (:ghpull:531).

Version 3.7

• Support for :ref:external data files <pyproject_toml_external_data> such as man pages or Jupyter extension support files (:ghpull:510).
• Project names are now lowercase in wheel filenames and .dist-info folder names, in line with the specifications (:ghpull:498).
• Improved support for :doc:bootstrapping <bootstrap> a Python environment, e.g. for downstream packagers (:ghpull:511). flit_core.wheel is usable with python -m to create wheels before the build <https://pypi.org/project/build/>_ tool is available, and flit_core sdists also include a script to install itself from a wheel before installer <https://pypi.org/project/installer/>_ is available.
• Use newer importlib APIs, fixing some deprecation warnings (:ghpull:499).

Version 3.6

• flit_core now bundles the tomli <https://pypi.org/project/tomli/>_ TOML parser library (version 1.2.3) to avoid a circular dependency between flit_core and tomli (:ghpull:492). This means flit_core now has no dependencies except Python itself, both at build time and at runtime, simplifying :doc:bootstrapping <bootstrap>.

Version 3.5.1

• Fix development installs with flit install --symlink and --pth-file, which were broken in 3.5.0, especially for packages using a src folder (:ghpull:472).

Version 3.5

• You can now use Flit to distribute a module or package inside a namespace package (as defined by :pep:420). To do this, specify the import name of the concrete, inner module you are packaging - e.g. name = "sphinxcontrib.foo"
  • either in the [project] table, or under [tool.flit.module] if you want to use a different name on PyPI (:ghpull:468).
• Flit no longer generates a setup.py file in sdists (.tar.gz packages) by default (:ghpull:462). Modern packaging tools don't need this. You can use the --setup-py flag to keep adding it for now, but this will probably be removed at some point in the future.
• Fixed how flit init handles authors' names with non-ASCII characters

... (truncated)

Commits

• 048c87c Bump version: 3.7.0 → 3.7.1
• a6e9501 Merge pull request #531 from pypa/i530
• b361f4b Add release note for fix
• 8a0ce88 Fix relative imports in init.py when exec-ing to get version
• c7c7945 Add failing test for issue gh-530
• bdafdfe Bump version: 3.6.0 → 3.7.0
• 621075d Merge pull request #528 from pypa/relnotes-3.7
• fed7a7e Release notes for 3.7
• ced1ef7 Merge pull request #511 from jameshilliard/bootstrap
• a63f42b Merge pull request #499 from pypa/importlib-warning
• Additional commits viewable in compare view

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[dependabot]

Looks like flit-core is up-to-date now, so this is no longer needed.