Fix type of result

Previously an abstract unist node was used as the type of the return
value.
This changes that to an estree `Program`, which should improve tools using
this project, even though some fields will exist that are not typed.

Author: wooorm

lib/index.js

@@ -5,8 +5,8 @@
  * @typedef {import('estree-jsx').Program} Program
  * @typedef {import('buffer').Buffer} Buffer
  * @typedef {any extends Buffer ? never : Buffer} MaybeBuffer
- *   This is the same as `Buffer` if node types are included, `never` otherwise.
- * @typedef {string|MaybeBuffer} Value
+ *   This is the same as `Buffer` if Node.js types are included, `never` otherwise.
+ * @typedef {string | MaybeBuffer} Value
  *
  *
  * @typedef AcornErrorFields
@@ -22,7 +22,7 @@
  * @returns {ParserClass}
  *   Resulting parser class.
  *
- * @typedef {2015|2016|2017|2018|2019|2020|2021|2022|'latest'} Version
+ * @typedef {2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 'latest'} Version
  *
  * @typedef Options
  *   Configuration (optional).
@@ -51,7 +51,11 @@ import {VFileMessage} from 'vfile-message'
 
 /**
  * @param {Value} value
+ *   Serialized JavaScript to parse.
  * @param {Options} [options={}]
+ *   Configuration (optional).
+ * @returns {Program}
+ *   Program node (as esast).
  */
 export function fromJs(value, options = {}) {
   /** @type {ParserClass} */
@@ -95,5 +99,6 @@ export function fromJs(value, options = {}) {
 
   tree.comments = comments
 
+  // @ts-expect-error: similar enough.
   return fromEstree(tree)
 }