Add Compression Support

+1 this is long overdue.

I've been avoiding this as compression on a single core will block any other activity in Node.js, so it's unlikely that a user will want that behaviour in the driver.

Unlike zlib which uses a the libuv threadpool for compressing/decompressing, there is no lz4 / snappy that uses the threadpool... So I don't see a way to properly implement it.

Another solution would be to try out the experimental worker threads api and if queuing work to other threads could help...

EDIT 2019-10-01:
worker threads are no longer experimental in Node.js 12+

I’ve detached compression support (this ticket) from threading optimizations for compression (NODEJS-567)