Click used in internal tooling published to pypi

[pbsds]

It seems like click is only a dev dependency, but you import it in user-facing endpoints. I think it should it be moved to [tool.poetry.dependencies]

[ekarademir]

URL checking is not used by the library itself. It's an internal tool. I.e. MongoD doesn't use it, or its imports don't use it either.

Its place is under downloader as convenience, but I can move it to somewhere else.