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/view.rs

@@ -338,7 +338,7 @@ declare_class!(
                 // Leave the Preedit self.ivars()
                 self.ivars().ime_state.set(ImeState::Ground);
             } else {
-                log::warn!("Expected to have IME enabled when receiving unmarkText");
+                tracing::warn!("Expected to have IME enabled when receiving unmarkText");
             }
         }