fix: display framework version on bootstrapped component (#13252)

modules/@angular/platform-server/src/platform-server.ts

@@ -8,3 +8,4 @@
 
 export {ServerModule, platformDynamicServer, platformServer} from './server';
 export * from './private_export';
+export {VERSION} from './version';

modules/@angular/platform-server/src/version.ts

@@ -0,0 +1,19 @@
+/**
+ * @license
+ * Copyright Google Inc. 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
+ */
+
+/**
+ * @module
+ * @description
+ * Entry point for all public APIs of the common package.
+ */
+
+import {Version} from '@angular/core';
+/**
+ * @stable
+ */
+export const VERSION = new Version('0.0.0-PLACEHOLDER');