Upgrade zlib-rs to 0.3.0 to get multiple bugfixes #381

Job	Run time
Rustfmt & Docs	15s
WebAssembly (wasm32-unknown-unknown)	8s
WebAssembly (wasm32-wasi)	7s
Test (stable)	1m 29s
Minimum Rust compiler (windows-2022)	2m 42s
Test (beta)	1m 32s
Minimum Rust compiler (macos-latest)	1m 13s
Test (nightly)	1m 19s
Minimum Rust compiler	44s
Minimum Rust compiler (ubuntu-latest)	1m 21s
Test (macos)	1m 28s
Test (windows)	3m 16s
Test (mingw)	2m 8s
	17m 42s

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