py311-flake8-future-annotations

Verifies python 3.7+ files use from __future__ import annotations

Verifies python 3.7+ files use from __future__ import annotations if a type is used in the module that can be rewritten using PEP 563. Pairs well with pyupgrade with the --py37-plus flag or higher, since pyupgrade only replaces type annotations with the PEP 563 rules if from __future__ import annotations is present.