Add missing `replica_set`, `ssl`, and `verify_mode` settings to `tap-mongodb`
See https://github.com/singer-io/tap-mongodb#set-up-config-file and https://github.com/singer-io/tap-mongodb/blob/f0fcc01e679acb40689b952d418425500fd17612/tap_mongodb/__init__.py#L357-L367.
New `settings` for `tap-mongodb` in `discovery.yml`:
```yml
- name: replica_set
- name: ssl
value: false
value_post_processor: stringify
- name: verify_mode
value: true
value_post_processor: stringify
```
They'll also need to be added to `docs/src/plugins/extractors/mongodb.md`.
There's also `include_schemas_in_destination_stream_name`: https://github.com/singer-io/tap-mongodb/blob/f0fcc01e679acb40689b952d418425500fd17612/tap_mongodb/__init__.py#L380
issue