Fix grouped list issue

Author: bc022699

package.json

@@ -1,6 +1,6 @@
 {
   "name": "framework7-react",
-  "version": "0.0.6",
+  "version": "0.0.7",
   "description": "A library of React components that leverages Framework7 HTML + CSS",
   "main": "dist/src/index.js",
   "typings": "dist/src/index.d.ts",

src/components/list/GroupedList.tsx

@@ -31,7 +31,7 @@ const buildGroupedItems = (items: any[], groupBy: string) => {
 };
 
 const getGroupItems = (groupedItems: { [groupName: string]: any[] }, value: string, props: IGroupedListProps) => {
-    groupedItems[value].map((item: any) =>
+    return groupedItems[value].map((item: any) =>
         <li key={item.id} className={`${(props.selectedItemId === item.id) ? props.selectedClass : ''}`}>
             <div className="item-content" key={item.id} onClick={() => props.onItemSelected(item.id)}>
                 <div className="item-inner">