Trigger property is duplicating the values

[rrupnoor]

Describe the bug
whenever steps list is added a new item, its getting duplicated in chatbox

import React, { Component } from 'react';
import ChatBot from 'react-simple-chatbot';

class App extends Component {
render() {
return (
<ChatBot
steps={[
{
id:'intro',
message:'Hello. What is your name?',
trigger:'intro1' } ,
{
id:'intro1',
message:'Hello',
end:true }
]}
/>
);
}

}

export default App;

Hello is coming twice after running the application

[Maxime-p]

I think it's a duplicate of #346