Make compatible with BSON 1.x

[LinusU]

This makes this package compatible with version 1.x of the BSON package, the one currently used by the official MongoDB package.

• It removes setMachineID/getMachineID which isn't present in the BSON package
• It moves ObjectID.generate to ObjectID.prototype.generate, and changes it to return 12-byte string
• id is now stored as a normal property (which allows clone to work 🙌)
• _bsontype is stored directly on the object instead of in the prototype (just to match BSON)
• probable some other minor changes 😅

[LinusU]

This should probably be released as a major version btw, since it makes some breaking changes.

Also, if you need help maintaining this package I would be happy to jump on!

(also ping @niftylettuce since you seem to be the last person cutting a release ☺️)

[niftylettuce]

v2.0.0 released

[williamkapke]

Thanks for this!

Thanks again @niftylettuce for handling it!