Update wgpu to 0.13

[parasyte]

This rebases #289 on top of the current main. Thanks to @JMS55 for contributing the initial work!

[JMS55]

This should probably bump bytemuck to 1.12 instead of 1.10. You may want to consider setting up dependabot.

Otherwise lgtm.

[parasyte]

I do all of my update checking by hand with cargo-outdated. I don't know how useful it will be to automate dependency update checks, yet. We're still blocked updating winit for example until the imgui-winit-support crate updates it as well.