Fix missing internal type

Closes syntax-tree/unist-util-position#10.
Closes syntax-tree/unist-util-position#11.

Author: wooorm

lib/index.js

@@ -7,7 +7,6 @@
  * @typedef {import('hast').Properties} Properties
  * @typedef {import('hast').Element} Element
  * @typedef {import('hast').ElementContent} Content
- * @typedef {import('unist-util-position').PositionLike} PositionLike
  *
  * @typedef EmbeddedHastFields
  * @property {string} [hName]
@@ -23,6 +22,15 @@
  * @typedef {MdastNode & {data?: Data}} NodeWithData
  *   unist node with embedded hast data.
  *
+ * @typedef PositionLike
+ * @property {PointLike | null | undefined} [start]
+ * @property {PointLike | null | undefined} [end]
+ *
+ * @typedef PointLike
+ * @property {number | null | undefined} [line]
+ * @property {number | null | undefined} [column]
+ * @property {number | null | undefined} [offset]
+ *
  * @callback Handler
  *   Handle a node.
  * @param {H} h