nested scroll view added

Author: ajangi

lib/react-native-multi-select.js

@@ -501,6 +501,7 @@ export default class MultiSelect extends Component {
           listKey={item => item[uniqueKey]}
           renderItem={rowData => this._getRow(rowData.item)}
           {...flatListProps}
+          nestedScrollEnabled
         />
       );
       searchTermMatch = renderItems.filter(item => item.name === searchTerm)