Fix timer typing in Carousel

(cherry picked from commit 5dd7cb6)

Author: ethanshar

generatedTypes/components/carousel/index.d.ts

@@ -16,7 +16,7 @@ declare class Carousel extends Component<CarouselProps, CarouselState> {
     static defaultProps: DefaultProps;
     static pageControlPositions: typeof PageControlPosition;
     carousel: RefObject<ScrollView>;
-    autoplayTimer?: number;
+    autoplayTimer?: ReturnType<typeof setTimeout>;
     orientationChange?: boolean;
     skippedInitialScroll?: boolean;
     constructor(props: CarouselProps);

src/components/carousel/index.tsx

@@ -33,7 +33,7 @@ class Carousel extends Component<CarouselProps, CarouselState> {
 
   static pageControlPositions = PageControlPosition;
   carousel: RefObject<ScrollView> = React.createRef();
-  autoplayTimer?: number;
+  autoplayTimer?: ReturnType<typeof setTimeout>;
   orientationChange?: boolean;
   skippedInitialScroll?: boolean;