Investigate NODE-4457 - 'mongodb-client-encryption' should be a dependency

NODE-4457 Description
I am getting the following error as of the last couple of days: 

`Module not found: Error: Can't resolve 'mongodb-client-encryption'`

This makes sense as the code is trying to use this module (file - `/node_modules/mongodb/lib/utils.js` - line 1126) even though it is not listed as a dependency.

Should this be listed as a dependency for the node package?