Tests

Bump the MSRV to 1.63.0 #1178

Job	Run time
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	1m 20s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	59s
Check doc	37s
test (macos-latest, x86_64-apple-darwin, stable)	1m 4s
test-ios	22s
test-ks	36s
test (windows-latest, x86_64-pc-windows-gnu, stable)	4m 18s
test (windows-latest, x86_64-pc-windows-msvc, beta)	1m 54s
test-miri	4m 51s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.61.0)	1m 55s
test-no-std	11s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	1m 41s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	1m 23s
	21m 11s

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