Just about every time I set up a new `Context.Provider`, I end up accidentally specifying a `values` prop rather than `value`.  While it's a minor error, generally I build the container in which the provider resides and commit it to the code base before I ever use it.  It's only later when I go to use it that I realize I did it again.  Since the `Context.Provider` seems pretty much useless without a `value` prop specified, I'd love it if there was a prop error if it is missing... especially if another prop is defined on the `Context.Provider` instead.
constructor() {
        super();
        this.state = {mouse: 'mouse'};
      }
      handleMoose() {
        this.setState({mouse: 'moose'});
      }
      render() {
        return <div>{this.state.mouse}</div>;
      }
    }
    const renderer = ReactTestRenderer.create(<Mouse />);
    expect(renderer.toJSON()).toEqual({
      type: 'div',
      props: {},
      children: ['mouse'],
    });
    const mouse = renderer.getInstance();
    mouse.handleMoose();
    expect(renderer.toJSON()).toEqual({
      type: 'div',
      children: ['moose'],
      props: {},
    });