ci(gitpod config): change gitpod task command

Author: innocces

.gitpod.yml

@@ -1,5 +1,9 @@
 tasks:
-  - init: yarn bootstrap
+  - name: dependencies
+    init: |
+      yarn global add lerna
+      yarn bootstrap
+  - name: dev server
     command: yarn start
 
 ports:

README.md

@@ -68,7 +68,7 @@ $ yarn
 $ yarn start
 ```
 
-会自动打开浏览器 - [http://localhost:12345](http://localhost:12345)  
+打开浏览器 - [http://localhost:12345](http://localhost:12345)  
 更多贡献详情见[官网文档](https://innocces.github.io/taro-hooks)
 
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