Changelog:
===========
- Completely modernized portalocker build system and added fully strict pyright
and mypy compliance with ruff formatting and checking.
- Dropped support for deprecated Python versions, only 3.9 and up are supported now.
Signed-off-by: Wang Mingyu <wangmy@cn.fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
