Make default props optional in type definition

[netmaxt3r]

Overview

this helps in unnecessary typescript errors while creating a wrapper component

Test Plan

suppose we create a warpper for modal component with app specific default props like below

import OModal, {ModalProps} from "react-native-modal";

export default function Modal(props: ModalProps) {
	return <OModal hideModalContentWhileAnimating={true} {...props} />;
}

you will see typescript error "TS2783: 'hideModalContentWhileAnimating' is specified more than once, so this usage will be overwritten."
when you use component with optional call backs from parent like below this.props.onModalShow is optional

<Modal 
   isVisible={this.state.show}
   onModalShow={this.props.onModalShow}>

you will see typescript error "TS2322: Type '(() => void) | undefined' is not assignable to type '() => void'.   Type 'undefined' is not assignable to type '() => void'."