Patch release GraphQL-core v3.1.2, based on GraphQL.js v15.1.0.
This release includes the following improvements:
- Added @SpecifiedBy directive
- Extended type definitions (#89)
- Enum type for visitor return values (#96)
- Visitors can now use class and static methods
- Lists in AST nodes are not optional any more (#98)
Thanks to everyone who helped with their feedback.