Change `tqdm` import to `tqdm.auto` for Jupyter compatability

[HaHeho]

Thank you for the extensive rework of the tool. I wasn't functional before, but now totally serves my purpose.

Currently, downloading bulk data with a progress bar does not work very well from within a Jupyter notebook. This could be improved by, e.g. changing the tqdm imports in bulk_data_mixins.py from from tqdm import tqdm to from tqdm.auto import tqdm. In that case, the display backend should automatically choose the best option between tqdm.notebook and tqdm.std depending on the context.
No other parts of the code would have to change. The only other place mentioning tqdm is test_bulk_data.py.

Do you think this is a good idea?

[NandaScott]

Hey thanks for using Scrython!

Sorry I haven't seen this! Github didn't notify me at all. I'll take a look at that this weekend. I don't see a reason I couldn't do that.

[NandaScott]

This was added in #149 and released in version 2.0.2 and should be good to go.