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Mismatched type in accesskit_macos dependency #23

Description

@maaku

On a fresh checkout on macOS, running cargo run --example complex generates the following error:

error[E0308]: mismatched types
  --> /Users/mark/.cargo/registry/src/index.crates.io-6f17d22bba15001f/accesskit_macos-0.15.0/src/patch.rs:44:13
   |
44 |             focus_forwarder as unsafe extern "C" fn(_, _) -> _,
   |             ^^^^^^^^^^^^^^^ one type is more general than the other
   |
   = note: expected fn pointer `unsafe extern "C" fn(&NSWindow, objc2::runtime::Sel) -> _`
              found fn pointer `unsafe extern "C" for<'a> fn(&'a NSWindow, objc2::runtime::Sel) -> _`

For more information about this error, try `rustc --explain E0308`.
error: could not compile `accesskit_macos` (lib) due to 1 previous error

accesskit_macos is a dependency pulled in by bevy so this shouldn't be quill's problem per se, but notably the bevy examples compile out of the box. I know that quill is using nightly features... maybe that's the source of the error?

Sorry for providing just a drive-by issue, but I was just interested in trying out quill and not deeply invested in this yet.

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