Relax BitTiming & BitTimingFd Validation #508

Job	Run time
static-code-analysis	38s
format	25s
docs	1m 24s
build	25s
test (ubuntu-latest, false, 3.8)	3m 4s
test (ubuntu-latest, false, 3.9)	2m 45s
test (ubuntu-latest, false, 3.10)	3m 9s
test (ubuntu-latest, false, 3.11)	2m 50s
test (ubuntu-latest, false, pypy-3.8)	4m 13s
test (ubuntu-latest, false, pypy-3.9)	3m 30s
test (macos-latest, false, 3.8)	2m 14s
test (macos-latest, false, 3.9)	2m 15s
test (macos-latest, false, 3.10)	2m 18s
test (macos-latest, false, 3.11)	7m 23s
test (macos-latest, false, pypy-3.8)	6m 36s
test (macos-latest, false, pypy-3.9)	5m 12s
test (windows-latest, false, 3.8)	2m 28s
test (windows-latest, false, 3.9)	2m 29s
test (windows-latest, false, 3.10)	2m 19s
test (windows-latest, false, 3.11)	2m 35s
test (windows-latest, false, pypy-3.8)	6m 19s
test (windows-latest, false, pypy-3.9)	7m 1s
test (ubuntu-latest, true, 3.12.0-alpha - 3.12.0)	3m 43s
upload_pypi	0s
coveralls	6s
	1h 15m 21s

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