0.20.3

Sebastian Dröge (6):
      glib: Add `ObjectInterface::Instance` for symmetry with `ObjectSubclass::Instance`
      glib: Assert that the size of the interface type is 0
      glib: Fix Rust 1.81 clippy warnings
      glib: Collation keys are not necessary valid UTF-8
      Update Cargo.lock
      Update version to 0.20.3

Tomoaki Kawada (2):
      glib: Do not use `end_unsafe` in `<Variant as From<VariantDict>>::from`
      glib-macros: Do not generate import of `Property{Get,Set}` in `Properties`