Log Message:
py-uwsgi: update to 2.0.21.

Changes

    Add PY_SSIZE_T_CLEAN define for Python 3.10 support (Thea Flowers)
    Fix PHP 8 missing arginfo warnings (Дамјан Георгиевски)
    Do not collide with the builtin compile function in uwsgiconfig.py (Jonathan \ 
Rosser)
    add uwsgi fork hooks to update internal interpreter state in python plugin \ 
(Tahir Butt)
    Properly call .close() as mandated by WSGI specs in python plugin (Florian \ 
Apolloner)
    Fix compilation with PHP 8.1 (Riccardo Magliocchetti)
    Fix memory corruption for uwsgi_cache_* in php plugin (aszlig)
    Cleanup usage of threading.current_thread (Hugo van Kemenade)
    Fix concurrency issues on build (Peter Law)
    Fix compilation on MacOS (Shachar Itzhaky)
    Fix segfault from gevent switch (Gavin Jeong)
    Fix php-app for PHP 8.1 (cuchac)
    make dev version PEP-0440 compliant (joshua.biagio)
    Add Python 3.11 support (Victor Stinner)
    Ensure to link against rt when statically linking the python plugin to \ 
libpython (Denis Dowling)
    Refactor CI to run tests in parallel (Nicola Martino)
    Add missing parens in plugins/coroae/uwsgiconfig.py (Eleksir)