feat(demo-app): add version number to header

Author: CaerusKaru

src/apps/demo-app/src/app/app.component.html

@@ -12,6 +12,7 @@ <h2>Layout Demos: </h2>
     <button mat-raised-button color="primary" [routerLink]="['issues']"> Github</button>
     <button mat-raised-button color="primary" [routerLink]="['stackoverflow']"> StackOverflow
     </button>
+    <span>Version: {{version}}</span>
   </div>
   <div fxFlex fxLayout="column"
        fxLayoutAlign="left top"

src/apps/demo-app/src/app/app.component.ts

@@ -1,8 +1,12 @@
 import {Component, ViewEncapsulation} from '@angular/core';
 
+import {VERSION} from '@angular/flex-layout';
+
 @Component({
   selector: 'demo-root',
   templateUrl: './app.component.html',
   encapsulation: ViewEncapsulation.None
 })
-export class AppComponent {}
+export class AppComponent {
+  version = VERSION.full;
+}