Log Message:
py-pyproject_hooks: updated to 1.1.0

v1.1

Add type annotations to the public API.
More careful handling of the backend-path key from pyproject.toml. Previous \ 
versions would load the backend and then check that it was loaded from the \ 
specified path; the new version only loads it from the specified path. The \ 
BackendInvalid exception is now a synonym for BackendUnavailable, and code \ 
should move to using the latter name.