Changelog

• Dropped support for Python 3.7.
• Added OpenTelemetry and opentelemetry_extension extension, importable form ariadne.tracing.opentelemetry.
• Added query_validator option to ASGI and WSGI GraphQL applications that enables customization of query validation step.
• Fixed ERROR message in GraphQL-WS protocol having invalid payload type.
• Fixed query cost validator incorrect handling of inline fragments.
• Fixed make_executable_schema error when null is used as default value for input typed field argument.
• Updated default GraphiQL2 template to use production build of React.js.
• Removed ExtensionSync. Extension now supports both async and sync contexts.
• Removed OpenTracingSync and opentracing_extension_sync. OpenTracing and opentracing_extension now support both async and sync contexts.
• Removed ApolloTracingSync. ApolloTracing now supports both async and sync contexts.