docs: support version switch

docs/src/App.vue

@@ -3,6 +3,7 @@
     active="小程序组件"
     :config="config"
     :github="github"
+    :versions="versions"
     :simulator="simulator"
   >
     <router-view />
@@ -10,7 +11,7 @@
 </template>
 
 <script>
-import docConfig, { github } from './doc.config';
+import docConfig, { github, versions } from './doc.config';
 
 const UNSHARED = [
   'common',
@@ -23,7 +24,8 @@ const UNSHARED = [
 export default {
   data() {
     return {
-      github
+      github,
+      versions
     };
   },
 

docs/src/doc.config.js

@@ -5,10 +5,11 @@ const { version } = packageJson;
 
 export const github = 'https://github.com/youzan/vant-weapp';
 
+export const versions = [version, '0.x'];
+
 export default {
   header: {
     logo: {
-      version,
       image: 'https://img.yzcdn.cn/vant/logo.png',
       title: 'Vant Weapp',
       href: '#/'