Tests

chore: fix ci issues #33

Job	Run time
check serde	1m 5s
clippy	1m 8s
check std	57s
docs	1m 26s
fmt	12s
check no-default-features	51s
test stable --no-default-features	1m 9s
test stable	53s
test stable --all-features	1m 48s
test beta --no-default-features	1m 6s
test beta	58s
test beta --all-features	1m 48s
test nightly --no-default-features	2m 15s
test nightly	2m 15s
test nightly --all-features	2m 29s
	20m 20s

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