Update `libz-sys` version #2

Job	Run time
Rustfmt	8s
Test (ubuntu-latest, stable)	15s
Test (ubuntu-latest, beta)	17s
Test (ubuntu-latest, nightly)	19s
Test (macos-latest, stable)	22s
Test (macos-latest, beta)	24s
Test (macos-latest, nightly)	23s
Test (windows-latest, stable)	2m 13s
Test (windows-latest, beta)	1m 14s
Test (windows-latest, nightly)	1m 15s
Test Cross Compile - aarch64-apple-ios	21s
Test Cross Compile - aarch64-unknown-linux-gnu	32s
Test Cross Compile - arm-unknown-linux-gnueabihf	35s
Test Cross Compile - powerpc-unknown-linux-gnu	34s
Test Cross Compile - s390x-unknown-linux-gnu	31s
Test Cross Compile - x86_64-unknown-linux-musl	35s
Test Cross Compile - aarch64-unknown-linux-musl	32s
Test Cross Compile - x86_64-pc-windows-gnu	55s
Test Cross Compile - x86_64-unknown-freebsd	30s
Test Cross Compile - x86_64-unknown-netbsd	36s
Test Cross Compile - x86_64-sun-solaris	5s
Test Cross Compile - x86_64-unknown-illumos	34s
	13m 10s

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