Add correct typing

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/generate-tray-icons/src/index.ts

@@ -156,7 +156,7 @@ try {
       generateImages(checkingForUpdatesImage, size, "trayIconCheckingForUpdates"),
     ];
 
-  let timeout;
+  let timeout: NodeJS.Timeout | undefined;
 
   await Promise.race([
     Promise.all(imageGenerators),
@@ -165,6 +165,8 @@ try {
     }, tenMinutes)),
   ]);
 
+  clearTimeout(timeout);
+
   console.log("Generated all images");
 } catch (error) {
   console.error(error);