[Bug] MongoURIStore not able to access some parent attributes.

[jmmshn]

https://github.com/materialsproject/maggma/blob/df713a2a920502a85469e69178ecd1ff18c1a78b/src/maggma/stores/mongolike.py#L557

This constructor is bypassing the one for MongoStore and as a result it does not populate some attributes that are needed by the methods inherited from MongoStore. (i.e. self.safe_update)