Update winit requirement from 0.29.10 to 0.30.4

[dependabot[bot]]

Updates the requirements on winit to permit the latest version.

Release notes

Sourced from winit's releases.

Winit version 0.30.4

Changed

• DeviceId::dummy() and WindowId::dummy() are no longer marked unsafe.

Fixed

• On Wayland, avoid crashing when compositor is misbehaving.
• On Web, fix WindowEvent::Resized not using requestAnimationFrame when sending WindowEvent::RedrawRequested and also potentially causing WindowEvent::RedrawRequested to not be de-duplicated.
• Account for different browser engine implementations of pointer movement coordinate space.

Commits

• 04d8a28 Winit version 0.30.4
• 949cb0f Web: fix MouseMotion coordinate space (#3770)
• bf68ac0 Web: fix WindowEvent::Resized not using rAF (#3790)
• ba18837 wayland: bump dependencies
• 6509f8a Make DeviceId/WindowId::dummy() safe (#3784)
• 71dea46 Fix CI (#3775)
• ec24c3e wayland: ignore events for dead objects
• feca480 Avoid path when importing modules (#3755)
• 655fdc8 ci: Use taiki-e/checkout-action
• faa641e Add notgull as Windows maintainer
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like winit is up-to-date now, so this is no longer needed.