Simplejson

* Replaced Travis-CI and AppVeyor with Github Actions,
adding wheels for Python 3.9.
https://github.com/simplejson/simplejson/pull/283

* Added arm64 to build matrix and reintroduced
manylinux wheels
https://github.com/simplejson/simplejson/pull/264
* No more bdist_wininst builds per PEP 527
https://github.com/simplejson/simplejson/pull/260
* Minor grammatical issue fixed in README
https://github.com/simplejson/simplejson/pull/261

* Updated documentation to be Python 3 first, and
have removed documentation notes about version changes
that occurred more than five years ago.
https://github.com/simplejson/simplejson/pull/257
https://github.com/simplejson/simplejson/pull/254
* Update build matrix for Python 3.8
https://github.com/simplejson/simplejson/pull/255
https://github.com/simplejson/simplejson/pull/256

* Added examples for JSON lines use cases
https://github.com/simplejson/simplejson/pull/236
* Add wheels for more Python versions and platforms
https://github.com/simplejson/simplejson/pull/234
https://github.com/simplejson/simplejson/pull/233
https://github.com/simplejson/simplejson/pull/231

* Restore old behavior with regard to the type of decoded empty
strings with speedups enabled on Python 2.x
https://github.com/simplejson/simplejson/pull/225
* Add python_requires to setup.py to help pip
https://github.com/simplejson/simplejson/pull/224
* Fix CSS in docs when built locally
https://github.com/simplejson/simplejson/pull/222

* Clean up the C code
https://github.com/simplejson/simplejson/pull/220
* Bypass the decode() method in bytes subclasses
https://github.com/simplejson/simplejson/pull/219
* Support builds without cStringIO
https://github.com/simplejson/simplejson/pull/217
* Allow to disable serializing bytes by default in Python 3
https://github.com/simplejson/simplejson/pull/216
* Simplify the compatibility code
https://github.com/simplejson/simplejson/pull/215
* Fix tests in Python 2.5
https://github.com/simplejson/simplejson/pull/214