Function applyRef

test/fixtures/preact.js:40–43

(ref, value)

		return obj;
	}
	function applyRef(ref, value) {
		if ('function' == typeof ref) ref(value);
		else if (null != ref) ref.current = value;
	}
	function cloneElement(vnode, props) {
		return h(
			vnode.nodeName,