Upgrade to release 3.12.3:
- Fix unaligned buffer handling on sparc64
- Preserve bitarray subtypes in operation return type hints
- Fix Hashable detection on Windows
- Add workflow to build and test on SPARC64, RISC-V and NetBSD 11
(amd64) (all successful)
- Add documentation for [platform support](platforms.rst)
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
