Fix setTimeout/setInterval typing

src/utils/Timer.ts

@@ -26,7 +26,7 @@ Once a timer is finished or aborted, it can't be started again
 a new one through `clone()` or `cloneIfRun()`.
 */
 export default class Timer {
-    private timerHandle: NodeJS.Timeout;
+    private timerHandle: number;
     private startTs: number;
     private promise: Promise<void>;
     private resolve: () => void;