Add a separate demo entry point

rollup builds the demo, everything else just gets the web component

packages/person-select/demo.js

+import 'vpu-auth';
+import './person-select-demo.js';

packages/person-select/index.js

 import 'vpu-auth';
 import './person-select.js';
-import './person-select-demo.js';

packages/person-select/person-select-demo.js

 import utils from './utils.js';
 import {i18n} from './i18n.js';
 import {html, LitElement} from 'lit-element';
+import './person-select.js';
 
 class PersonSelectDemo extends LitElement {
     constructor() {

packages/person-select/rollup.config.js

@@ -11,7 +11,7 @@ const build = (typeof process.env.BUILD !== 'undefined') ? process.env.BUILD : '
 console.log("build: " + build);
 
 export default {
-    input: 'index.js',
+    input: 'demo.js',
     output: {
         file: 'dist/bundle.js',
         format: 'esm'