Graphql-core

First beta release of GraphQL-core 3.1, based on GraphQL.js v15.0.0rc1.

In addition to incorporating the latest changes from GraphQL.js (see the list of changes in GraphQL.js [v15.0.0a1](https://github.com/graphql/graphql-js/releases/tag/v15.0.0-alpha.1), [v15.0.0a2](https://github.com/graphql/graphql-js/releases/tag/v15.0.0-alpha.2) and [v15.0.0rc1](https://github.com/graphql/graphql-js/releases/tag/v15.0.0-rc.1)), this release also contains the following improvements and changes:

* Change: Use `Undefined` instead of `INVALID` which is now deprecated (77)
* Use explicit `Optional` type on arguments (76)
* Remove unnecessary result type annotation from `__init__` methods (python/mypy5677)
* Better docstring for `ast_from_value`
* Better docstring for `lexicographic_sort_schema` (75)
* Fixed a minor issue when coverting lists in `ast_from_value()`
* Fixed a minor issue with `MapAsyncIterator.athrow()`
* Improved test coverage (trying to reach 100% for final release)

Contributors to this release were:

Cito, hoefling

Thanks to everybody who contributed by sending bug reports or pull requests. Please continue to report any problems you find in this beta release, so that these can be fixed in the final v3.1 release.

Patch release GraphQL-core v3.0.6, based on GraphQL.js v14.7.0.

This release backports Python 3.9 and 3.10 support to the 3.0 branch.

Bugfix release GraphQL-core v3.0.5, based on GraphQL.js v14.6.0.

The following issues are fixed in this release:

* Added type hint to default_field_resolver (88)
* Fixed memoization of collect_subfields (91)
* Fixed method name in Visitor docstring (92)

Contributors to this release were:

Cito, hoefling, nawatts, rafalp

Thanks to everyone who helped by sending bug reports or pull requests.

Patch release of GraphQL-core 3, based on GraphQL.js v14.6.0.

The primary fix is the new repository address [github.com/graphql-python/graphql-core](https://github.com/graphql-python/graphql-core) in the meta data.

Patch release of GraphQL-core 3, based on GraphQL.js v14.6.0.

This is essentially the same as version 3.0.2 except for one minor change:

* Added `Undefined` as a forward compatible alias for `INVALID`, which should be imported from the top level.

Patch release of GraphQL-core 3, based on GraphQL.js v14.6.0.

This is essentially the same as version 3.0.1 except for one minor change:

* Added the missing validation rules that could not be imported from the `graphql` and `graphql.validation` packages.

Some requirements have also been updated, and we officially support Python 3.8 now.