ci: check only basic features with MSRV #24

Job	Run time
Rustfmt	11s
Documentation	10s
Clippy	20s
Test (x86_64-unknown-linux-gnu, 1.64.0)	1m 26s
Test (x86_64-unknown-linux-gnu, stable)	1m 4s
Test (x86_64-unknown-linux-gnu, nightly)	54s
Test (x86_64-apple-darwin, 1.64.0)	1m 42s
Test (x86_64-apple-darwin, stable)	1m 15s
Test (x86_64-apple-darwin, nightly)	1m 42s
Test (x86_64-pc-windows-msvc, 1.64.0)	1m 27s
Test (x86_64-pc-windows-msvc, stable)	1m 28s
Test (x86_64-pc-windows-msvc, nightly)	1m 27s
	13m 6s

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