Build improvements #716

Job	Run time
rustfmt	14s
Test stable ubuntu-latest --no-default-features	1m 39s
Test stable ubuntu-latest	1m 56s
Test stable ubuntu-latest --all-features	2m 6s
Test stable macos-latest --no-default-features	4m 25s
Test stable macos-latest	5m 2s
Test stable macos-latest --all-features	5m 33s
Test stable windows-latest --no-default-features	4m 13s
Test stable windows-latest	4m 1s
Test stable windows-latest --all-features	4m 12s
Test beta ubuntu-latest --all-features	2m 3s
Test nightly ubuntu-latest --all-features	2m 2s
Release x86_64-unknown-linux-gnu	1m 10s
Release aarch64-unknown-linux-gnu	1m 10s
Release armv7-unknown-linux-gnueabihf	1m 13s
Release arm-unknown-linux-gnueabihf	1m 11s
Release riscv64gc-unknown-linux-gnu	1m 6s
Release x86_64-apple-darwin	2m 27s
Release aarch64-apple-darwin	1m 28s
Release x86_64-pc-windows-msvc	3m 18s
Release aarch64-pc-windows-msvc	3m 6s
	53m 35s

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