Mongodb driver 4.x Support

[apocist]

Migrates basic query support to the latest MongoDb driver ^4.1.0.
The latest MongoDB driver allows access to MongoDB Altas cloud infrastructure and loadBalanced databases. Connection to this atlas service is impossible with the 3.x series at this time.

These changes break compatibility with MongoDb driver 3.x

As of writing, various servers are successfully using this currently for Mongo Altas Serverless instances.

Known MongoDb Driver 4.x references found in source files and

• https://github.com/mongodb/node-mongodb-native/blob/4.0/docs/CHANGES_4.0.0.md
• https://github.com/mongodb/node-mongodb-native/releases/tag/v4.1.0

Implements #638

Checklist

• DCO (Developer Certificate of Origin) signed in all commits
• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• Commit messages are following our guidelines

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been closed due to continued inactivity. Thank you for your understanding. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository.