Use new eslint package- fix lint issues in ts and js

src/hooks/useDispatcher.ts

@@ -22,7 +22,7 @@ import {Dispatcher} from "flux";
 // Hook to simplify listening to flux dispatches
 export const useDispatcher = (dispatcher: Dispatcher<ActionPayload>, handler: (payload: ActionPayload) => void) => {
     // Create a ref that stores handler
-    const savedHandler = useRef((payload: ActionPayload) => {});
+    const savedHandler = useRef((_: ActionPayload) => {});
 
     // Update ref.current value if handler changes.
     useEffect(() => {