feat(configuration): Adds missing implermentations

source/Groups/GroupConfigurationHandler.ts

@@ -12,12 +12,13 @@ import {isPlainObject} from "is-plain-object";
 export class GroupConfigurationHandler {
   static DEFAULT_CONFIGURATION: RuntimeGroupConfiguration = {
     channels: null,
-    locale: new Intl.Locale('en-GB'),
     permissions: {
       allowMemberManagingPlaydates: false
     },
     calendar: {
-      title: null
+      title: null,
+      description: null, 
+      location: null
     }
   }