Add testcase for bool type (#25) #72

Job	Run time
feature checks	16s
docs	17s
clippy	16s
fmt	11s
check WASM	6s
test stable --no-default-features	6s
test stable	11s
test stable --all-features	10s
test beta --no-default-features	14s
test beta	16s
test beta --all-features	13s
test nightly --no-default-features	17s
test nightly	12s
test nightly --all-features	13s
test 1.64 --no-default-features	2m 11s
test 1.64	2m 18s
test 1.64 --all-features	2m 14s
	9m 41s

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