typescript definition label

[kambing86]

related to this #125

we cannot just use JSX.Element, because all other types like string will cause error like below now

Type 'string' is not assignable to type 'Element'

according to react js doc, https://reactjs.org/docs/typechecking-with-proptypes.html

  // Anything that can be rendered: numbers, strings, elements or an array
  // (or fragment) containing these types.
  optionalNode: PropTypes.node,

[kambing86]

I believe you can use React.ReactNode in node_modules/@types/react/index.d.ts