v3.3.0a8

Alpha release GraphQL-core v3.3.0a8, based on GraphQL.js v17.0.0a3.

Notable improvements since the last alpha release:

• Fix IntrospectionQuery type definition (#234)
• Cancel remaining fields on exceptions (#236 and #238)
• Cancel remaining list and iterator items on exceptions
• Cancel remaining type resolvers on exceptions
• Suppress records for deferred fragments that are completely empty
• Add support for @OneOf directives in print_schema

Thanks again to the sponsors of this project, @patrick91, @jkimbo, and to @erikwrede, @magikmark, @mgorven, @sobolevn and @willemt for contributing to this release.

Sorry for lagging behind upstream a bit and not always responding as quickly as I want to.