Dagshub

Now you can refresh datasets from inside the Voxel UI in the dagshub plugin.
This release also includes changes relating to uploading metadata, hoping to make it more robust

What's Changed
* Daemonize ThreadPoolExecutor in download_files by kbolashev in https://github.com/DagsHub/client/pull/335
* Warn users about plugin not working in Colab by kbolashev in https://github.com/DagsHub/client/pull/336
* Fix bug in upload api with a status and progress conflicting by kbolashev in https://github.com/DagsHub/client/pull/337
* Add ability to refresh a dataset from voxel by kbolashev in https://github.com/DagsHub/client/pull/338


**Full Changelog**: https://github.com/DagsHub/client/compare/0.3.1...0.3.2

This release contains following changes:

- Upload: If you try to do `dagshub upload` to a repo mirrored from GitHub, there used to be a lot of `push rejected` errors. We have now implemented a mitigation mechanism that checks for a changing revision of the branch, and if there were any changes, we now wait for the commit to propagate from GitHub back to DagsHub. This will lead to slower but hopefully error-less uploads.
- Data Engine: you can no longer query on fields that don't exist in the datasource
- Streaming: Fixed a bug where monkey-patched `open()` didn't work when running inside Jupyter.

What's Changed
* Fix URL checking of create_datasource by guysmoilov in https://github.com/DagsHub/client/pull/327
* Added multi-source dataloader support by jinensetpal in https://github.com/DagsHub/client/pull/328
* Add the Data Engine docs unser docs directory by nirbarazida in https://github.com/DagsHub/client/pull/329
* Throw error on trying to query a field that doesn't exist in the schema by kbolashev in https://github.com/DagsHub/client/pull/331
* corrected invalid base url by jinensetpal in https://github.com/DagsHub/client/pull/314
* Scheduled weekly dependency update for week 30 by pyup-bot in https://github.com/DagsHub/client/pull/330
* Fix for mirror upload sync issues by kbolashev in https://github.com/DagsHub/client/pull/324


**Full Changelog**: https://github.com/DagsHub/client/compare/0.3.0...0.3.1

This release fixes a problem that could occur when creating datasources via `datasources.create_datasource()`

We are releasing a big new feature to DagsHub - Data Engine!

It's designed to simplify handling metadata in unstructured datasets and you can learn about it more [in our docs](https://dagshub.com/docs/feature_guide/data_engine/)

Additionally we also have a README file that you can check out:
https://github.com/DagsHub/client/blob/master/dagshub/data_engine/README.md

The feature will be deployed to everyone on July 24th

This release has following docs improvements:
- Docstring for `dagshub.init()`
- More descriptive error message for `install_hooks()` when we couldn't find a git repository
- DagsHubAPIError should be showing the error that it received in the exception stack trace
- If we get a non-json response from the API we now show that