v3.3.0a3

Alpha release GraphQL-core v3.3.0a3, based on GraphQL.js v17.0.0a2.

This alpha release ports the remaining changes in GraphQL.js v17.0.0a2.

Particularly noteworthy are these new features:

• Reference implementation of defer and stream spec (graphql/graphql-spec#693)
• Client controlled nullability experiment implementation (graphql/graphql-spec#867)
• Limit max number of tokens in parser (graphql/graphql-js#3684)

There is also one breaking change:

• The subscribe function now stays synchronous when possible.
  This change aligns the return types of execute and subscribe
  (as well as the create_source_event_stream function)
  with respect to returning values or awaitables (graphql/graphql-js#3620).

This alpha release also contains the following changes and features:

• Undefined is not an exception any more (#187)
• Optimized parallel execution when there is only one task (#190)
• GraphQLInputFieldOutType is now importable (#195)
• Include name in representation of nodes (#198)
• Turn MapAsyncIterable into an AsyncGenerator (#199)

Big shoutout to all who are sponsoring me (@Cito), such as @indeedeng, @patrick91 and @jkimbo, and to all who contributed by reporting issues or sending PRs, such as @erikwrede, @ipeterov, @kevinvalk, @kristjanvalur, @LinuxIsCool, @QSHolzner and @rafalp.