Solve a warning

Warning: Failed child context type: Invalid child context virtualizedCell.cellKey of type number supplied to CellRenderer, expected string。
Modify the 262 line
 keyExtractor (item, index) {
        return index.toString();   // old :  return index;
    }

Author: MrJYJ

src/libraries/ViewPager/index.js

@@ -260,7 +260,7 @@ export default class ViewPager extends PureComponent {
     }
 
     keyExtractor (item, index) {
-        return index;
+        return index.toString();
     }
 
     renderRow ({ item, index }) {