Fix lints

src/settings/ProfileSettingsTab.tsx

@@ -47,7 +47,7 @@ export const ProfileSettingsTab: FC<Props> = ({ client }) => {
   useEffect(() => {
     const form = formRef.current!;
     // Auto-save when the user dismisses this component
-    return () => {
+    return (): void => {
       if (formChanged.current) {
         const data = new FormData(form);
         const displayNameDataEntry = data.get("displayName");

src/settings/submit-rageshake.ts

@@ -334,7 +334,7 @@ export function useRageshakeRequestModal(
 
     client.on(ClientEvent.Event, onEvent);
 
-    return () => {
+    return (): void => {
       client.removeListener(ClientEvent.Event, onEvent);
     };
   }, [setOpen, roomId, client]);