Update raw-window-handle to 0.4.1

[madsmtm]

Ready for when rust-windowing/raw-window-handle#70 gets merged, and a stable version published.

• Tested on all platforms changed
• Compilation warnings were addressed
• cargo fmt has been run on this branch
• cargo doc builds successfully
• Added an entry to CHANGELOG.md if knowledge of this change could be valuable to users
• Updated documentation to reflect any user-facing changes, including notes of platform-specific behavior
• Created or updated an example program if it would help users understand this functionality
• Updated feature matrix, if new features were added or implemented

[madsmtm]

This should be ready now, but I don't think it should be included in the 0.26.0 release, since that will prevent winit 0.26.0 from being used with crates that are using raw-window-handle version 0.3. We probably need to do collaborate on an ecosystem-wide rollout

[madsmtm]

See rust-windowing/raw-window-handle#74 for an upgrade plan

[kchibisov]

@madsmtm Could you provide an update on this PR? I can't keep an eye on all the bits in ecosystem right now, and I don't want to hold v0.26.0 release of winit.

[madsmtm]

This is currently waiting on raw-window-handle v0.3.4 being released, I suspect it will take a day, maybe three. See rust-windowing/raw-window-handle#79.

If it takes longer due to unforeseen circumstances, I'm fine with just releasing winit v0.26.0 as-is.

[a1phyr]

raw-window-handle v0.3.4 has just been released, so this can go forward.

[madsmtm]

Yup, this is ready to be merged.

I've tested this with a small personal project using bevy, they use the raw-window-handle traits from v0.3, and it works fine with this PR.

Again, just for clarification, because of the blanket impl<T: new::HasRawWindowHandle> old::HasRawWindowHandle for T in v0.3.4, by implementing the new trait we still implement the old one. Hence this is not a breaking change! (Users might have to do a cargo update though, not entirely sure about how the cargo caching works).