Update toolkit demo

packages/data-table-view/src/dbp-data-table-view-demo.js

@@ -6,7 +6,7 @@ import {ScopedElementsMixin} from '@open-wc/scoped-elements';
 import * as commonUtils from '@dbp-toolkit/common/utils';
 import * as commonStyles from '@dbp-toolkit/common/styles';
 
-class DataTableViewDemo extends ScopedElementsMixin(LitElement) {
+export class DataTableViewDemo extends ScopedElementsMixin(LitElement) {
     constructor() {
         super();
         this.lang = 'de';

packages/file-handling/src/demo.js

@@ -5,7 +5,7 @@ import {ScopedElementsMixin} from '@open-wc/scoped-elements';
 import {FileSource} from './file-source.js';
 import * as commonUtils from '@dbp-toolkit/common/utils';
 
-class FileSourceDemo extends ScopedElementsMixin(LitElement) {
+export class FileSourceDemo extends ScopedElementsMixin(LitElement) {
     constructor() {
         super();
         this.lang = 'de';

packages/language-select/src/dbp-language-select-demo.js

@@ -37,7 +37,7 @@ class LanguageSelectDisplay extends LitElement {
     }
 }
 
-class LanguageSelectDemo extends ScopedElementsMixin(LitElement) {
+export class LanguageSelectDemo extends ScopedElementsMixin(LitElement) {
 
     constructor() {
         super();