explicit-function-return-type creating functional component react in typescript

const App: FC = () => {
   const addItem = () => {
      useState([...items, {id:1,name:'something'])
   }
   return<div>hello</div>
}

linter gave me error, on my App.tsx.

warning  Missing return type on function  @typescript-eslint/explicit-function-return-type

I have to turn off explicit-function-return-type, how to fix above code? The AddItem doesn't have to return something.