Updated the files.

my-app/node_modules/@schematics/angular/interface/index.d.ts

@@ -0,0 +1,10 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { Rule } from '@angular-devkit/schematics';
+import { Schema as InterfaceOptions } from './schema';
+export default function (options: InterfaceOptions): Rule;