Investigate NODE-4399 - Add Dictionary support to zstd library

NODE-4399 Description

For the following library:

https://github.com/mongodb-js/zstd

please add passing on a pre-trained dictionary as an (optional) argument.

Training data on known structures etc. improves compression rate my a magnitude of 2-3, especially for small data.

Since this is one of the main selling points of zstd, it's a crucial feature to have.