Wrong type for `mc_cursor:next`?

[larshesel]

The spec for mc_cursor:next/1 looks like this(https://github.com/comtihon/mongodb-erlang/blob/master/src/connection/mc_cursor.erl#L40):

-spec next(pid()) -> error | {bson:document()}.

and the bson:document() is a tuple. It seems like what the cursor really returns is actually {map()} which is also supported by the test cases https://github.com/comtihon/mongodb-erlang/blob/master/test/mc_worker_api_SUITE.erl#L257

[comtihon]

Thanks, I'll check it out.