Change sprite.js src prop type to string in native

Author: TomiS

src/native/components/sprite.js

@@ -9,7 +9,7 @@ export default class Sprite extends Component {
     onPlayStateChanged: PropTypes.func,
     repeat: PropTypes.bool,
     scale: PropTypes.number,
-    src: PropTypes.number,
+    src: PropTypes.string,
     state: PropTypes.number,
     steps: PropTypes.array,
     style: PropTypes.object,