Strawberry-graphql

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This release updates Strawberry's codebase to use new features in Python 3.8.
It also removes `backports.cached-property` from our dependencies, as we can
now rely on the standard library's `functools.cached_property`.

Contributed by [Thiago Bellini Ribeiro](https://github.com/bellini666) via [PR #2995](https://github.com/strawberry-graphql/strawberry/pull/2995/)

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Fix strawberry mypy plugin for pydantic v1

Contributed by [tjeerddie](https://github.com/tjeerddie) via [PR #3019](https://github.com/strawberry-graphql/strawberry/pull/3019/)

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Fix import error in `strawberry.ext.mypy_plugin` for users who don't use pydantic.

Contributed by [David Němec](https://github.com/davidnemec) via [PR #3018](https://github.com/strawberry-graphql/strawberry/pull/3018/)

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Adds initial support for pydantic V2.

This is extremely experimental for wider initial testing.

We do not encourage using this in production systems yet.

Contributed by [James Chua](https://github.com/thejaminator) via [PR #2972](https://github.com/strawberry-graphql/strawberry/pull/2972/)

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This release fixes an issue on `relay.ListConnection` where async iterables that returns
non async iterable objects after being sliced where producing errors.

This should fix an issue with async strawberry-graphql-django when returning already
prefetched QuerySets.

Contributed by [Thiago Bellini Ribeiro](https://github.com/bellini666) via [PR #3014](https://github.com/strawberry-graphql/strawberry/pull/3014/)

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This releases improves how we handle Annotated and async types
(used in subscriptions). Previously we weren't able to use
unions with names inside subscriptions, now that's fixed 😊

Example:

python
strawberry.type
class A:
a: str


strawberry.type
class B:
b: str


strawberry.type
class Query:
x: str = "Hello"


strawberry.type
class Subscription:
strawberry.subscription
async def example_with_union(self) -> AsyncGenerator[Union[A, B], None]:
yield A(a="Hi")


Contributed by [Patrick Arminio](https://github.com/patrick91) via [PR #3008](https://github.com/strawberry-graphql/strawberry/pull/3008/)