Should document breaking change between 2.0.5 and 2.0.6

[KevinFink]

I have been struggling for nearly a month to figure out why my app broke, and finally tracked it down today. The default behavior for 2.0.5 was to include all sheets in the output of drive.spreadsheet_metadata() so that sheets in a shared drive would be found by worksheet(). In 2.0.6 the is_team_drive property was added, and set to False by default, so that sheets in a shared drive are no longer found.

[KevinFink]

Also, an example of how to use the include_items_from_all_drive parameter in the Drive wrapper would be helpful. I tried to just set it to True but that didn't affect the behavior. I want to search across multiple Shared Drives, so I'd rather not have to iterate over a list.