Add Verona API setting to prod environment file

src/environments/environment.prod.ts

@@ -4,5 +4,6 @@ export const environment = {
   production: true,
   testcenterUrl: '/api/',
   appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
-  apiVersionExpected: '5.0.1'
+  apiVersionExpected: '5.0.1',
+  veronaApiVersionSupported: '2.1.0'
 };