Bump mongodb and connect-mongo

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) to 4.17.1 and updates ancestor dependency [connect-mongo](https://github.com/jdesboeufs/connect-mongo). These dependencies need to be updated together.


Updates `mongodb` from 3.6.5 to 4.17.1
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/v4.17.1/HISTORY.md)
- [Commits](mongodb/node-mongodb-native@v3.6.5...v4.17.1)

Updates `connect-mongo` from 4.4.1 to 4.6.0
- [Changelog](https://github.com/jdesboeufs/connect-mongo/blob/master/CHANGELOG.md)
- [Commits](jdesboeufs/connect-mongo@v4.4.1...v4.6.0)

---
updated-dependencies:
- dependency-name: mongodb
  dependency-type: indirect
- dependency-name: connect-mongo
  dependency-type: direct:production
...

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