zlib: align with streams

• Ensure automatic destruction only happens after both 'end' and 'finish' has been emitted through autoDestroy.
• Ensure close() callback is always invoked.
• Ensure 'error' is only emitted once.

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