zlib: fix node crashing on invalid options

This PR fixes the Node process crashing when constructors of classes of the zlib module are given invalid options.

• Throw an Error when the zlib library rejects the value of windowBits, instead of crashing with an assertion.
• Treat windowBits and memLevel options consistently with other ones and don't crash when non-numeric values are given.

Fixes: https://github.com/nodejs/node/issues/13082

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

zlib