Cibuildwheel

_19 July 2020_

- 🛠 Update CPython 3.8 to 3.8.3 (405)
- 🛠 Internal refactoring of Linux build, to move control flow into Python (386)

_8 July 2020_

- 🐛 Fix an issue on Windows where pyproject.toml would cause an error when
some requirements formats were used. (401)
- 🛠 Update CPython 3.7 to 3.7.8 (394)

_25 June 2020_

- 🐛 Fix "OSError: [WinError 17] The system cannot move the file to a different
disk drive" on GitHub Actions (388, 389)

_24 June 2020_

- 🌟 Add [`CIBW_BEFORE_ALL`](https://cibuildwheel.pypa.io/en/stable/options/#before-all)
option, which lets you run a command on the build machine before any wheels
are built. This is especially useful when building on Linux, to `make`
something external to Python, or to `yum install` a dependency. (342)
- ✨ Added support for projects using pyproject.toml instead of setup.py
(360, 358)
- ✨ Added workaround to allow Python 3.5 on Windows to pull dependencies from
pyproject.toml. (358)
- 📚 Improved GitHub Actions examples and docs (354, 362)
- 🐛 Ensure pip wheel uses the specified package, and doesn't build a wheel
from PyPI (369)
- 🛠 Internal changes: using pathlib.Path, precommit hooks, testing
improvements.

_25 May 2020_

- 🛠 Dependency updates, including CPython 3.8.3 & manylinux images.
- 🛠 Lots of internal updates - type annotations and checking using mypy, and
a new integration testing system.
- ⚠️ Removed support for *running* cibuildwheel using Python 3.5. cibuildwheel
will continue to build Python 3.5 wheels until EOL.

_4 May 2020_

- 🐛 Fix a bug causing programs running inside the i686 manylinux images to
think they were running x86_64 and target the wrong architecture. (336,
338)