PyO3 0.20.3
This is a stability & compatibility release to fix a couple of minor compilation edge cases from PyO3 0.20.2.
The portable-atomic dependency has been added to resolve compile failures on platforms without 64-bit atomic support.
A maximum Python version check (currently for Python 3.12) has been added to prevent using old PyO3 code against future Python versions beyond the supported range.
Thank you to the following users for the improvements:
Contributors
davidhewitt and adamreichold