Fix: Login deleting old clients was conflicting with login history

Chore: Moved to angular linting using the recommended plugins / settings

overlord/src/app/closing-stock/closing-stock.service.ts

@@ -18,10 +18,8 @@ export class ClosingStockService {
 
   list(date: string | null): Observable<ClosingStock> {
     const listUrl = date === null ? url : `${url}/${date}`;
-    return <Observable<ClosingStock>>(
-      this.http
-        .get<ClosingStock>(listUrl)
-        .pipe(catchError(this.log.handleError(serviceName, 'list')))
-    );
+    return this.http
+      .get<ClosingStock>(listUrl)
+      .pipe(catchError(this.log.handleError(serviceName, 'list'))) as Observable<ClosingStock>;
   }
 }