change type #801

Job	Run time
rustfmt	6s
Test stable ubuntu-latest --no-default-features	1m 47s
Test stable ubuntu-latest	3m 22s
Test stable ubuntu-latest --all-features	2m 16s
Test stable macos-latest --no-default-features	2m 43s
Test stable macos-latest	4m 55s
Test stable macos-latest --all-features	3m 14s
Test stable windows-latest --no-default-features	3m 17s
Test stable windows-latest	5m 3s
Test stable windows-latest --all-features	4m 32s
Test beta ubuntu-latest --all-features	2m 15s
Test nightly ubuntu-latest --all-features	2m 15s
Release x86_64-unknown-linux-gnu	59s
Release aarch64-unknown-linux-gnu	1m 3s
Release armv7-unknown-linux-gnueabihf	1m 3s
Release arm-unknown-linux-gnueabihf	1m 17s
Release riscv64gc-unknown-linux-gnu	1m 3s
Release x86_64-apple-darwin	1m 13s
Release aarch64-apple-darwin	1m 17s
Release x86_64-pc-windows-msvc	1m 59s
Release aarch64-pc-windows-msvc	1m 57s
	47m 36s

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