• Added validation_rules option to query executors as well as ASGI and WSGI apps and Django view that allow developers to include custom query validation logic in their APIs.
  
• Added introspection option to ASGI and WSGI apps, allowing developers to disable GraphQL introspection on their server.
  
• Added validation.cost_validator query validator that allows developers to limit maximum allowed query cost/complexity.
  
• Removed default literal parser from ScalarType because GraphQL already provides one.
  
• Added extensions and introspection configuration options to Django view.
  
• Updated requirements list to require graphql-core 3.