Console error: Warning: Unknown props `onExited`, `appear`, `enter`, `exit` on <li> tag.

Warning: Unknown props `onExited`, `appear`, `enter`, `exit` on <li> tag. Remove these props from the element. 
 in li (created by GuestList)
    in ul (created by TransitionGroup)
    in TransitionGroup (created by GuestList)
    in div (created by GuestList)
    in GuestList

import React, { Component } from 'react';
import { render } from 'react-dom';
import {CSSTransition, TransitionGroup } from 'react-transition-group';

    return (
      <div className="guest-list">
        <h1>Guest List</h1>
        <input type="text" placeholder="Invite Someone" value={this.state.newName} onKeyDown={this.handleChange.bind(this)} />
        <TransitionGroup component ="ul">

          {guests}

        </TransitionGroup>
      </div>
    );
  }
}