Add GraphQLValidationError as a subclass of GraphQLError#3593
Closed
IvanGoncharov wants to merge 1 commit intographql:mainfrom 
Closed
Add `GraphQLValidationError` as a subclass of `GraphQLError`#3593IvanGoncharov wants to merge 1 commit intographql:mainfrom 
IvanGoncharov wants to merge 1 commit intographql:mainfrom