Log Message:
Update py-meson to 0.50.1

No release notes available. Highlights from git log:

96ceeb18 detect 'arm64' as aarch64 CPU family
e8827989 Fail gracefully for Apple frameworks with a non-Clang compiler. Closes \ 
#5070.
c28c8b82 compilers: -fsanitize is not supported on OpenBSD (second pass)
53fd29f6 test: fix "get define" on OpenBSD
265cb592 compilers: -fsanitize is not supported on OpenBSD
3e38a069 Support relative paths in pkgconfig files
fc0aad8a Fix build = host cross builds for 0.50.*