devel/py-strawberry-graphql: Update to 0.287.4

• Also chase the renaming of www/py-lia-web to www/py-cross-web in af1c4623f4e7 and keep the dependencies sorted.

Changelog since 0.287.2:

https://github.com/strawberry-graphql/strawberry/blob/0.287.4/CHANGELOG.md