TextArea needs a way to be disabled

[birdofpreyru]

react-utils/src/shared/components/TextArea/index.tsx

Lines 14 to 20 in 74fb97d

	type Props = {
	onChange?: React.ChangeEventHandler<HTMLTextAreaElement>;
	onKeyDown?: React.KeyboardEventHandler<HTMLTextAreaElement>;
	placeholder?: string;
	theme: Theme<typeof validThemeKeys>;
	value?: string;
	};