refactor: replace depracted absoluteFillObject with absoluteFill

Author: lklima

src/Shimmer.tsx

@@ -98,5 +98,5 @@ const styles = StyleSheet.create({
     height: '100%',
     width: '100%',
   },
-  gradientWrapper: StyleSheet.absoluteFillObject,
+  gradientWrapper: StyleSheet.absoluteFill,
 });