[Meta] Unassigned gfi(good first issue)

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1. Allow specifying non-iterable return types for generators #854
   good first issue +1
2. Allow more return types for async generators #787
   good first issue +1
3. Implement more logic for file loader / resolver for multi-file tests #705
   good first issue +1
4. Tracking of super() call in constructor is wrong #596
   good first issue +1
5. [extra error] Type guard of form type of other should be filter string | number | boolean #1056
   good first issue +1
6. Timer logging should be switched to a flag. #1081
   good first issue +1