Test to fix travis build issue

src/app/+search-page/search-options.model.ts

 import { isNotEmpty } from '../shared/empty.util';
 import { URLCombiner } from '../core/url-combiner/url-combiner';
+import 'core-js/library/fn/object/entries';
 
 export enum ViewMode {
   List = 'list',

tsconfig.json

@@ -26,8 +26,7 @@
       "es6",
       "es2015",
       "es2016",
-      "es2017",
-      "es2017.object"
+      "es2017"
     ]
   },
   "exclude": [