Update to Netty 4.2.0

Zio-http does not send the correct Content-Type response header.

Missing Authorization header is reported as 400 instead of 401

Generated openAPI shows example in application/json instead of specified text/plain

XML Codec

Implement NIO scheduler for ZIO

Implement NIO scheduler for ZIO

Parallelism level in `ZStream#mapZIOPar` is bounded by the buffer size

Implement NIO scheduler for ZIO

OOM when receiving large streaming requests