Ensure that all time zones are contained (#200) #615

Job	Run time
lint (1.56)	1m 32s
test	31s
lint (1.56, -Zminimal-versions)	1m 28s
lint (stable)	17s
clippy-pedantic	16s
audit	14s
lint (stable, -Zminimal-versions)	19s
cross-miri (aarch64-unknown-linux-gnu)	42s
lint (nightly)	24s
DevSkim	32s
cross-miri (i586-unknown-linux-gnu)	41s
lint (nightly, -Zminimal-versions)	27s
doc	26s
cross-miri (powerpc-unknown-linux-gnu)	41s
cross-miri (powerpc64-unknown-linux-gnu)	39s
fmt	19s
Miri	54s
cross-miri (powerpc64le-unknown-linux-gnu)	40s
	11m 2s

Provide feedback