Updated the files.

my-app/node_modules/@angular-devkit/schematics/tools/node-modules-test-engine-host.d.ts

@@ -0,0 +1,23 @@
+/**
+ * @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 { TaskConfiguration } from '../src/engine';
+import { FileSystemSchematicContext } from './description';
+import { NodeModulesEngineHost } from './node-module-engine-host';
+/**
+ * An EngineHost that uses a registry to super seed locations of collection.json files, but
+ * revert back to using node modules resolution. This is done for testing.
+ */
+export declare class NodeModulesTestEngineHost extends NodeModulesEngineHost {
+    private _collections;
+    private _tasks;
+    get tasks(): TaskConfiguration<{}>[];
+    clearTasks(): void;
+    registerCollection(name: string, path: string): void;
+    transformContext(context: FileSystemSchematicContext): FileSystemSchematicContext;
+    protected _resolveCollectionPath(name: string, requester?: string): string;
+}