tests

update changelog and support policy #3139

Job	Run time
upstream-py311 (nocmk)	1m 18s
upstream-py311 (sourcebuildcheck)	3m 5s
tests (ubuntu-latest, x64, 3.8, local-slow)	6m 0s
upstream-py311 (test-upstream-requirements-py311)	1m 15s
tests (ubuntu-latest, x64, 3.9, local-slow)	5m 45s
tests (ubuntu-latest, x64, 3.10, local-slow)	5m 22s
tests (ubuntu-latest, x64, 3.11, local-slow)	5m 31s
tests (ubuntu-latest, x64, 3.12, local-slow)	5m 33s
tests (ubuntu-latest, x64, 3.x, local-slow)	6m 6s
tests (windows-latest, x64, 3.8, local-slow)	5m 33s
tests (windows-latest, x64, 3.9, local-slow)	5m 33s
tests (windows-latest, x64, 3.10, local-slow)	6m 11s
tests (windows-latest, x64, 3.11, local-slow)	5m 49s
tests (windows-latest, x64, 3.12, local-slow)	5m 32s
tests (windows-latest, x64, 3.x, local-slow)	6m 20s
tests (windows-latest, x86, 3.8, local-slow)	11m 6s
tests (windows-latest, x86, 3.9, local-slow)	11m 39s
tests (windows-latest, x86, 3.10, local-slow)	11m 59s
tests (windows-latest, x86, 3.11, local-slow)	11m 16s
tests (windows-latest, x86, 3.12, local-slow)	11m 20s
tests (windows-latest, x86, 3.x, local-slow)	11m 57s
tests (macos-12, x64, 3.8, local-slow)	9m 25s
tests (macos-12, x64, 3.9, local-slow)	8m 19s
tests (macos-12, x64, 3.10, local-slow)	6m 55s
tests (macos-12, x64, 3.11, local-slow)	6m 29s
tests (macos-12, x64, 3.12, local-slow)	5m 45s
tests (macos-12, x64, 3.x, local-slow)	6m 40s
	3h 7m 43s

Provide feedback