build(deps): Bump mongodb from 3.1.4 to 3.5.2 (#76)

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) from 3.1.4 to 3.5.2.
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/master/CHANGES_3.0.0.md)
- [Commits](mongodb/node-mongodb-native@v3.1.4...v3.5.2)

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