Set MSRV to 1.63 for all crates #133

Job	Run time
Check clippy	1m 50s
Compile on MSRV	1m 40s
Check formatting	28s
Run integration tests (5.7)	10m 10s
Validate MSRV and minimal dependency versions (Cargo.lock.msrv, MSRV)	2m 31s
Run integration tests (5.6)	10m 42s
Run unit tests (windows-latest, stable)	2m 41s
Validate MSRV and minimal dependency versions (Cargo.lock.min, minimal dependency versions)	2m 26s
Run integration tests (4.4)	10m 27s
Run unit tests (windows-latest, beta)	2m 30s
Run integration tests (4.3)	10m 36s
Run unit tests (windows-latest, 1.63.0)	10m 13s
Run integration tests (4.2)	11m 0s
Run unit tests (macOS-latest, stable)	1m 12s
Run integration tests (4.1)	9m 31s
Run unit tests (macOS-latest, beta)	1m 19s
Run unit tests (macOS-latest, 1.63.0)	3m 5s
Run unit tests (ubuntu-latest, stable)	54s
Run unit tests (ubuntu-latest, beta)	44s
Run unit tests (ubuntu-latest, 1.63.0)	2m 29s
Release	0s
	1h 36m 28s

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