1.1.7 - depend on `zlib-rs` directly and remove `libz-rs-sys`

What's Changed

• chore: make some documents clearer by @reddaisyy in #510
• Explain rationale for choosing bufread,read,write modules by @jongiddy in #512
• use Decompress::reset() instead of recreating in DeflateDecoder by @amirshukayev in #514
• use zlib_rs api by @folkertdev in #513

New Contributors

• @reddaisyy made their first contribution in #510
• @amirshukayev made their first contribution in #514

Full Changelog: 1.1.5...1.1.6