Bump flit from 1.3 to 2.2.0

[dependabot-preview]

Bumps flit from 1.3 to 2.2.0.

Changelog

Sourced from flit's changelog.

Release history

Version 2.2

• Allow underscores in package names with Python 2 (305).
• Add a --no-setup-py option to build sdists without a backwards-compatible setup.py file (311).
• Fix the generated setup.py file for packages using a src/ layout (303).
• Fix detecting when more than one file matches the module name specified (307).
• Fix installing to a venv on Windows with the --python option (300).
• Don't echo the command in scripts installed with --symlink or --pth-file on Windows (310).
• New bootstrap_dev.py script to set up a development installation of Flit from the repository (301, 306).

Version 2.1

• Use compression when adding files to wheels.
• Added the FLIT_INSTALL_PYTHON environment variable (295), to configure flit to always install into a Python other than the one it's running on.
• flit_core uses the intreehooks shim package to load its bootstrapping backend, until a released version of pip supports the standard backend-path mechanism.

Version 2.0

Flit 2 is a major architecture change. The flit_core package now provides a 517 backend for building packages, while flit is a command line interface <cmdline> extending that.

The build backend works on Python 2, so tools like pip should be able to install packages built with flit from source on Python 2. The flit command requires Python 3.5 or above. You will need to change the build-system table in your pyproject.toml file to look like this:

[build-system]
requires = ["flit_core >=2,<3"]
build-backend = "flit_core.buildapi"

Other changes include:

• Support for storing your code under a src/ folder (260). You don't need to change any configuration if you do this.
• Options to control what files are included in an sdist - see pyproject_toml_sdist for the details.
• Requirements can specify a URL 'direct reference', as an alternative to a version number, with the syntax defined in 440: requests @ https://example.com/requests-2.22.0.tar.gz.
• Fix the shebang of scripts installed with the --python option and the --symlink flag (286).
• Installing with --deps develop now installs normal dependencies as well as development dependencies.
• Author email is no longer required in the metadata table (289).
• More error messages are now shown without a traceback (254)

Commits

• 93482e4 Version number -> 2.2.0
• ebe5aa9 Add release notes for 2.2
• 645512f Merge pull request #311 from takluyver/opt-no-setup-py
• bd294aa Fix compatibility with Python 3.5
• df51fda Test making sdist with no setup.py
• 9210448 Document --no-setup-py option
• 12a3bbc Add an option to make sdists without setup.py
• 7cd39b0 Merge pull request #310 from StephenRoille/master
• bc8d8e8 fix(windows): Turn "echo" off in batch scripts
• 9d072eb Merge pull request #307 from takluyver/conflicting-modules
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #8.