fix: use stapps core version to compare with backends' core version

Note: not app version (e.g. 2.0.0).

Closes #77

src/app/_helpers/fake-backend.interceptor.ts

@@ -13,18 +13,19 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {
-  HTTP_INTERCEPTORS,
   HttpClient,
   HttpEvent,
   HttpHandler,
   HttpInterceptor,
   HttpRequest,
   HttpResponse,
+  HTTP_INTERCEPTORS,
 } from '@angular/common/http';
 import {Injectable} from '@angular/core';
 import {SCIndexResponse, SCSettingInputType, SCThingOriginType, SCThingType} from '@openstapps/core';
 import {Observable, of} from 'rxjs';
 import {delay, map} from 'rxjs/operators';
+import {dependencies} from '../../../package.json';
 import {facetsMock} from './data/sample-facets';
 import {SampleThings} from './data/sample-things';
 
@@ -268,7 +269,7 @@ export const sampleIndexResponse: SCIndexResponse = {
     ],
   },
   backend: {
-    SCVersion: '2.0.0',
+    SCVersion: dependencies['@openstapps/core'],
     externalRequestTimeout: 5000,
     hiddenTypes: [
       SCThingType.DateSeries,