Update dependencies

[marc0246]

Changelog:

### Public dependency updates
- [raw-window-handle](https://crates.io/raw-window-handle) 0.6
- [winit](https://crates.io/crates/winit) 0.29

### Breaking changes
- `Surface::required_extensions` now returns a result.
- `Surface::from_window[_ref]` now take `HasWindowHandle + HasDisplayHandle` as the window and return a new error type.

[marc0246]

Closing in favor of #2385. Turns out it was the bump to proc-macro-crate 2.0 that caused CI to shit itself after all, I missed it because there was a new unrelated error. Why this only fails in CI is a mystery to me still and will need further investigation.