Fix undefined progress in Spinner component

packages/components/src/spinner/index.native.js

@@ -9,7 +9,7 @@ import { View } from 'react-native';
 import style from './style.scss';
 
 export default function Spinner( props ) {
-	const { progress } = props;
+	const { progress = 0 } = props;
 
 	const width = progress + '%';