2.0.200601.2

Changes:

• d6a0412 Simply when_all implementation and test (#647)
• d610942 Edge cases in when_all (#645)
• dd4d45e final_suspend (#644)
• 82fa8ec Improve async cancellation interop (#643)
• 78d212a Improve com_array construction (#642)
• 094921d Delete null-assignment. (#636) [ #627 ]
• 2f2911f Added debugging GUID comment generation (#630)

This list of changes was auto generated.