docs: add typescript version requirement

Author: liximomo

README.md

@@ -54,6 +54,8 @@ After installing the plugin you can use the [Composition API](https://vue-compos
 
 # TypeScript
 
+**Please upgrade to the latest TypeScript. If you are using vetur, make sure to set `vetur.useWorkspaceDependencies` to `ture`.**
+
 To let TypeScript properly infer types inside Vue component options, you need to define components with `createComponent`:
 
 ```ts

README.zh-CN.md

@@ -54,6 +54,8 @@ Vue.use(VueCompositionApi);
 
 # TypeScript
 
+**请使用最新版的 TypeScript，如果你使用了 `vetur`，请将 `vetur.useWorkspaceDependencies` 设为 `true`。**
+
 为了让 TypeScript 正确的推到类型，我们必须使用 `createComponent` 来定义组件:
 
 ```ts