chore: fix ci issues #34

Job	Run time
check no-default-features	44s
check std	44s
check serde	51s
clippy	1m 18s
docs	1m 17s
fmt	14s
test stable --no-default-features	1m 15s
test stable	1m 29s
test stable --all-features	1m 32s
test beta --no-default-features	58s
test beta	1m 5s
test beta --all-features	1m 39s
test nightly --no-default-features	51s
test nightly	45s
test nightly --all-features	1m 19s
	16m 1s

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