Add ForEach to demo

demos/justact-test/src/index.jsx

@@ -1,9 +1,10 @@
 // const justact = require('justact');
 import * as justact from 'justact';
 
+import { ForEach } from 'justact';
+
 class InputMultiplex extends justact.Component {
     render () {
-        console.log('InputMultiplex', this);
         return this.swap ? (
             <input value={this.valueB$} type="text" />
         ) : (
@@ -18,6 +19,9 @@ class App extends justact.Component {
             <div>
                 <input  type="checkbox" value={this.swap$} />
                 <InputMultiplex swap={this.swap$}></InputMultiplex>
+                <ForEach array={[1,2,3]} render={item => (
+                    <input value={item} disabled />
+                )} />
             </div>
         )
     }