vue3 setup not support app event onError

不工作
```

import {onError, onLaunch} from "@dcloudio/uni-app";

onLaunch(() => {
console.log('App Launch')
})

onError(() => {
console.log('Arrr')
})

```

can work
```

export default {
onLaunch: function () {
console.log('App Launch')
},
onError: function () {
console.log('App erre')
},
}

```