Type-stubs rely on deprecated bytes type promotion

The current type stubs seem to rely on an old poorly documented (and now deprecated) behaviour where type checkers would treat `bytes` as the union `bytes | bytearray | memoryview` in annotations.

The union should now be explicit, or even better (especially for c-bindings, like PySide) use the new Buffer Protocol. See https://peps.python.org/pep-0688/

pyright 1.1.329 now stops implying `bytes` as `bytes | bytearray | memoryview` union by default in strict mode ( https://github.com/microsoft/pyright/releases/tag/1.1.329 )

mypy has two hidden flags (--disable-bytearray-promotion and --disable-memoryview-promotion) which will be default in the next major version (see https://github.com/python/mypy/issues/15313 )

For instance, passing a `memoryview` to `QImage` will now result in an error in strict mode