fix safari test

src/services/browserPlatformUtils.service.spec.ts

@@ -88,6 +88,11 @@ describe('Browser Utils Service', () => {
                 value: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8'
             });
 
+            Object.defineProperty(window, 'safari', {
+                configurable: true,
+                value: {}
+            });
+
             const browserPlatformUtilsService = new BrowserPlatformUtilsService(null);
             expect(browserPlatformUtilsService.getDevice()).toBe(DeviceType.Safari);
         });