Require libclang 9.0 or newer #2377

Job	Run time
minimal	11s
rustfmt-clippy	34s
docs	18s
msrv	59s
check-cfg	22s
quickchecking	19s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	1m 50s
test-book	12s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 51s
test-expectations (ubuntu-latest)	53s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	2m 41s
test-expectations (macos-12)	1m 17s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	1m 44s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 21s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 42s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 29s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 36s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	4m 8s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	4m 36s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	4m 54s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	4m 29s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	5m 1s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	4m 43s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	4m 54s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	4m 36s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 46s
test (macos-12, 9.0, 0, 0, 0)	2m 8s
success	1s
	1h 4m 35s

Provide feedback