Cibuildwheel

_2 May 2020_

- 🌟 Deterministic builds. cibuildwheel now locks the versions of the tools it
uses. This means that pinning your version of cibuildwheel pins the versions
of pip, setuptools, manylinux etc. that are used under the hood. This should
make things more reliable. But note that we don't control the entire build
environment on macOS and Windows, where the version of Xcode and Visual
Studio can still effect things.

This can be controlled using the [CIBW_DEPENDENCY_VERSIONS](https://cibuildwheel.pypa.io/en/stable/options/#dependency-versions)
and [manylinux image](https://cibuildwheel.pypa.io/en/stable/options/#linux-image)
options - if you always want to use the latest toolchain, you can still do
that, or you can specify your own pip constraints file and manylinux image.
(256)

- ✨ Added `package_dir` command line option, meaning we now support building
a package that lives in a subdirectory and pulls in files from the wider
project. See [the `package_dir` option help](https://cibuildwheel.pypa.io/en/stable/options/#command-line-options)
for more information.

Note that this change makes the working directory (where you call
cibuildwheel from) relevant on Linux, as it's considered the 'project' and
will be copied into the Docker container. If your builds are slower on this
version, that's likely the reason. `cd` to your project and then call
`cibuildwheel` from there. (319, 295)

- 🛠 On macOS, we make `MACOSX_DEPLOYMENT_TARGET` default to `10.9` if it's
not set. This should make things more consistent between Python versions.
- 🛠 Dependency updates - CPython 3.7.7, CPython 2.7.18, Pypy 7.3.1.

_12 March 2020_

- 🌟 Add support for building on GitHub Actions! Check out the
[docs](https://cibuildwheel.pypa.io/en/stable/setup/#github-actions)
for information on how to set it up. (194)
- ✨ Add the `CIBW_BEFORE_TEST` option, which lets you run a command to
prepare the environment before your tests are run. (242)

_8 March 2020_

- 🌟 Add support for building PyPy wheels, across Manylinux, macOS, and
Windows. (185)
- 🌟 Added the ability to build ARM64 (aarch64), ppc64le, and s390x wheels,
using manylinux2014 and Travis CI. (273)
- ✨ You can now build macOS wheels on Appveyor. (230)
- 🛠 Changed default macOS minimum target to 10.9, from 10.6. This allows the
use of more modern C++ libraries, among other things. (156)
- 🛠 Stop building universal binaries on macOS. We now only build x86_64
wheels on macOS. (220)
- ✨ Allow chaining of commands using `&&` and `||` on Windows inside
CIBW_BEFORE_BUILD and CIBW_TEST_COMMAND. (293)
- 🛠 Improved error reporting for failed Cython builds due to stale .so files
(263)
- 🛠 Update CPython from 3.7.5 to 3.7.6 and from 3.8.0 to 3.8.2 on Mac/Windows
- 🛠 Improved error messages when a bad config breaks cibuildwheel's PATH
variable. (264)
- ⚠️ Removed support for *running* cibuildwheel on Python 2.7. cibuildwheel
will continue to build Python 2.7 wheels for a little while. (265)

_7 December 2019_

- 🌟 Add support for building manylinux2014 wheels. To use, set
`CIBW_MANYLINUX_X86_64_IMAGE` and CIBW_MANYLINUX_I686_IMAGE to
`manylinux2014`.
- ✨ Add support for [Linux on Appveyor](https://www.appveyor.com/blog/2018/03/06/appveyor-for-linux/) (#204, 207)
- ✨ Add `CIBW_REPAIR_WHEEL_COMMAND` env variable, for changing how
`auditwheel` or `delocate` are invoked, or testing an equivalent on
Windows. (211)
- 📚 Added some travis example configs - these are available in /examples. (228)

_10 November 2019_

- 🌟 Add support for building Python 3.8 wheels! (180)
- 🌟 Add support for building manylinux2010 wheels. cibuildwheel will now
build using the manylinux2010 images by default. If your project is still
manylinux1 compatible, you should get both manylinux1 and manylinux2010
wheels - you can upload both to PyPI. If you always require manylinux1 wheels, you can
build using the old manylinux1 image using the [manylinux image](https://cibuildwheel.pypa.io/en/stable/options/#linux-image) option.
(155)
- 📚 Documentation is now on its [own mini-site](https://cibuildwheel.pypa.io),
rather than on the README (169)
- ✨ Add support for building Windows wheels on Travis CI. (160)
- 🛠 If you set `CIBW_TEST_COMMAND`, your tests now run in a virtualenv. (164)
- 🛠 Windows now uses Python as installed by nuget, rather than the versions
installed by the various CI providers. (180)
- 🛠 Update Python from 2.7.16 to 2.7.17 and 3.7.4 to 3.7.5 on macOS (171)
- ⚠️ Removed support for Python 3.4 (168)

_29 September 2019_

- ✨ Add CIBW_TEST_EXTRAS option, to allow testing using extra_require
options. For example, set `CIBW_TEST_EXTRAS=test,qt` to make the wheel
installed with `pip install <wheel_file>[test,qt]`
- 🛠 Update Python from 3.7.2 to 3.7.4 on macOS
- 🛠 Update OpenSSL patch to 1.0.2t on macOS