Release `v0.21.3` #1181

Job	Run time
lock_check (ubuntu-latest, 3.10, 1.4.0)	34s
copyright_and_dependencies_check (ubuntu-latest, 3.10)	2m 10s
linter_checks (ubuntu-latest, 3.10)	4m 35s
lock_check (macos-latest, 3.10, 1.4.0)	47s
gitleaks	13s
lock_check (windows-latest, 3.10, 1.4.0)	1m 26s
test (ubuntu-latest, 3.8)	2m 40s
test (ubuntu-latest, 3.9)	2m 21s
test (ubuntu-latest, 3.10)	2m 17s
test (ubuntu-latest, 3.11)	2m 50s
test (macos-latest, 3.8)	2m 29s
test (macos-latest, 3.9)	2m 6s
test (macos-latest, 3.10)	1m 48s
test (macos-latest, 3.11)	1m 40s
test (windows-latest, 3.8)	3m 57s
test (windows-latest, 3.9)	4m 40s
test (windows-latest, 3.10)	3m 43s
test (windows-latest, 3.11)	4m 59s
	45m 15s

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