Updated the files.

my-app/node_modules/@schematics/angular/enum/files/__name@dasherize____type__.ts.template

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+export enum <%= classify(name) %> {
+}

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

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+/**
+ * @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 EnumOptions } from './schema';
+export default function (options: EnumOptions): Rule;

my-app/node_modules/@schematics/angular/enum/index.js

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+"use strict";
+/**
+ * @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
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const generate_from_files_1 = require("../utility/generate-from-files");
+function default_1(options) {
+    options.type = options.type ? `.${options.type}` : '';
+    return (0, generate_from_files_1.generateFromFiles)(options);
+}
+exports.default = default_1;

my-app/node_modules/@schematics/angular/enum/schema.d.ts

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+/**
+ * Generates a new, generic enum definition in the given project.
+ */
+export interface Schema {
+    /**
+     * The name of the enum.
+     */
+    name: string;
+    /**
+     * The path at which to create the enum definition, relative to the current workspace.
+     */
+    path?: string;
+    /**
+     * The name of the project in which to create the enum. Default is the configured default
+     * project for the workspace.
+     */
+    project: string;
+    /**
+     * Adds a developer-defined type to the filename, in the format "name.type.ts".
+     */
+    type?: string;
+}

my-app/node_modules/@schematics/angular/enum/schema.js

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+"use strict";
+// THIS FILE IS AUTOMATICALLY GENERATED. TO UPDATE THIS FILE YOU NEED TO CHANGE THE
+// CORRESPONDING JSON SCHEMA FILE, THEN RUN devkit-admin build (or bazel build ...).
+Object.defineProperty(exports, "__esModule", { value: true });

my-app/node_modules/@schematics/angular/enum/schema.json

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+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "SchematicsAngularEnum",
+  "title": "Angular Enum Options Schema",
+  "type": "object",
+  "description": "Generates a new, generic enum definition in the given project.",
+  "additionalProperties": false,
+  "properties": {
+    "name": {
+      "type": "string",
+      "description": "The name of the enum.",
+      "$default": {
+        "$source": "argv",
+        "index": 0
+      },
+      "x-prompt": "What name would you like to use for the enum?"
+    },
+    "path": {
+      "type": "string",
+      "format": "path",
+      "$default": {
+        "$source": "workingDirectory"
+      },
+      "description": "The path at which to create the enum definition, relative to the current workspace.",
+      "visible": false
+    },
+    "project": {
+      "type": "string",
+      "description": "The name of the project in which to create the enum. Default is the configured default project for the workspace.",
+      "$default": {
+        "$source": "projectName"
+      }
+    },
+    "type": {
+      "type": "string",
+      "description": "Adds a developer-defined type to the filename, in the format \"name.type.ts\"."
+    }
+  },
+  "required": ["name", "project"]
+}