message: set_urgent on mac throws a warning
  On mac, compiling throws a warning due to `is_urgent` not being used within `set_urgent`. This can be changed just by using an underscore instead.
diff: @@ -348,7 +348,7 @@ impl Window {
  }
  #[cfg(not(any(target_os = "linux", target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd")))]
  - pub fn set_urgent(&self, is_urgent: bool) {
  + pub fn set_urgent(&self, _: bool) {
  }
  #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd"))]
  