Replace log with tracing

Tracing is a modern replacement for the log crate that allows for
annotating log messages with the function that they come from.

Signed-off-by: John Nunley <dev@notgull.net>
Closes: #3482

src/platform_impl/macos/cursor.rs

@@ -71,7 +71,7 @@ unsafe fn try_cursor_from_selector(sel: Sel) -> Option<Id<NSCursor>> {
         let cursor: Id<NSCursor> = unsafe { msg_send_id![cls, performSelector: sel] };
         Some(cursor)
     } else {
-        log::warn!("cursor `{sel}` appears to be invalid");
+        tracing::warn!("cursor `{sel}` appears to be invalid");
         None
     }
 }