change type #746

Job	Run time
rustfmt	10s
Test stable ubuntu-latest --no-default-features	1m 45s
Test stable ubuntu-latest	1m 59s
Test stable ubuntu-latest --all-features	2m 11s
Test stable macos-latest --no-default-features	4m 54s
Test stable macos-latest	3m 12s
Test stable macos-latest --all-features	4m 41s
Test stable windows-latest --no-default-features	3m 47s
Test stable windows-latest	5m 15s
Test stable windows-latest --all-features	5m 43s
Test beta ubuntu-latest --all-features	2m 20s
Test nightly ubuntu-latest --all-features	2m 10s
Release x86_64-unknown-linux-gnu	1m 10s
Release aarch64-unknown-linux-gnu	1m 7s
Release armv7-unknown-linux-gnueabihf	1m 11s
Release arm-unknown-linux-gnueabihf	1m 13s
Release riscv64gc-unknown-linux-gnu	1m 5s
Release x86_64-apple-darwin	1m 49s
Release aarch64-apple-darwin	2m 13s
Release x86_64-pc-windows-msvc	2m 38s
Release aarch64-pc-windows-msvc	2m 11s
	52m 44s

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