Setproctitle

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- Added Python 3.10 packages (issue 102).
- Added Wheel packages for macOS (issue 96).
- Package build moved to cibuildwheel, other wheels provided (issue 47).

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- Fixed Windows build (issues 89, 90).
- Added wheel packages for Windows (issues 47, 90).
- Added wheel packages for aarch64 (issue 95).

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- Fixed segfault after ``os.environ.clear()`` (issue 88).

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- added ``getthreadtitle()`` and ``setthreadtitle()``.
- Initialisation of the module moved to the first usage: importing the module
doesn't cause side effects.
- Manage much longer command lines (issue 52)
- Improved build on BSD, dropped ancient versions (issue 67).
- Fixed build for Python 3.8 (issues 66, 72)
- Added support for Python 3.9
- Dropped support for Python < 3.6

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- Fixed building with certain ``prctl.h`` implementations (issue 44).
- Use ``setuptools`` if available (issue 48).

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- Fixed build on VC (issues 20, 33).
- Added ``MANIFEST.in`` to the source distribution to help with RPM building
(issue 30).