Strawberry-graphql

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Add `Starlette` to the integrations section on the documentation.

Contributed by [Marcelo Trylesinski](https://github.com/Kludex) [PR #1287](https://github.com/strawberry-graphql/strawberry/pull/1287/)

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This release add support for the upcoming python 3.10 and it adds support
for the new union syntax, allowing to declare unions like this:

python
import strawberry


strawberry.type
class User:
name: str


strawberry.type
class Error:
code: str


strawberry.type
class Query:
find_user: User | Error


Contributed by [Patrick Arminio](https://github.com/patrick91) [PR #719](https://github.com/strawberry-graphql/strawberry/pull/719/)

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This release adds support for the `graphql-transport-ws` GraphQL over WebSocket
protocol. Previously Strawberry only supported the legacy `graphql-ws` protocol.

Developers can decide which protocols they want to accept. The following example shows
how to do so using the ASGI integration. By default, both protocols are accepted.
Take a look at our GraphQL subscription documentation to learn more.

python
from strawberry.asgi import GraphQL
from strawberry.subscriptions import GRAPHQL_TRANSPORT_WS_PROTOCOL
from api.schema import schema


app = GraphQL(schema, subscription_protocols=[GRAPHQL_TRANSPORT_WS_PROTOCOL])


Contributed by [Jonathan Ehwald](https://github.com/DoctorJohn) [PR #1256](https://github.com/strawberry-graphql/strawberry/pull/1256/)

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Nests the resolver under the correct span; prior to this change your span would have looked something like:


GraphQL Query
GraphQL Parsing
GraphQL Validation
my_resolver
my_span_of_interest 1
my_sub_span_of_interest 2


After this change you'll have:


GraphQL Query
GraphQL Parsing
GraphQL Validation
GraphQL Resolving: my_resolver
my_span_of_interest 1
my_sub_span_of_interest 2


Contributed by [Michael Ossareh](https://github.com/ossareh) [PR #1281](https://github.com/strawberry-graphql/strawberry/pull/1281/)

-------------------

Enhances strawberry.extensions.tracing.opentelemetry to include spans for the Parsing and Validation phases of request handling. These occur before your resovler is called, so now you can see how much time those phases take up!

Contributed by [Michael Ossareh](https://github.com/ossareh) [PR #1274](https://github.com/strawberry-graphql/strawberry/pull/1274/)

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Fix `extensions` argument type definition on `strawberry.Schema`

Contributed by [Guillaume Andreu Sabater](https://github.com/g-as) [PR #1276](https://github.com/strawberry-graphql/strawberry/pull/1276/)