Limit the customer phone number field at 10 of length

[reymesson1]

On the class customermodal

constructor(){

    super();
    this.state = {

        value: ""
    }
}

handleChange(event){

    if(event.target.value.length<=10){            
        this.setState({
            value: event.target.value
        })
    }  

}

[reymesson1]

Remove the '-' function