Fix type error by Jsx.addKeyProp for the empty props

[mununki]

This PR is related to #640 (comment)

The issue is the props type is not matched in case of empty props.

module A = {
  type props = {}
}

React.createElement(A.make, Jsx.addKeyProp({}: A.props<_>, "k")) // Error
// The type A.props is not generic so expects no arguments,
// but is here applied to 1 argument(s)

The solution is using React.createElementWithKey instead of Jsx.addKeyProp.

1. Add React.createElementWithKey rescript-lang/rescript-react@a4c31f8
2. Add type constraint of return type for Jsx.addKeyProp Add the return type constraint for Jsx.addKeyProp rescript#5670
3. Use 1 and 2 in the JSX ppx