Remove use of URL from node:url

Also:

* add locks of TS for now
* update test fixture for external formatting improvements

Related-to GH-70.
Closes GH-71.

Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Author: lxcid

lib/util/resolve.js

@@ -2,8 +2,6 @@
  * @typedef {import('../types.js').H} H
  */
 
-import {URL} from 'node:url'
-
 /**
  * @param {H} h
  * @param {string|null|undefined} url

package.json

@@ -67,7 +67,7 @@
     "rimraf": "^3.0.0",
     "tape": "^5.0.0",
     "type-coverage": "^2.0.0",
-    "typescript": "^4.0.0",
+    "typescript": "~4.4.0",
     "unified": "^10.0.0",
     "unist-builder": "^3.0.0",
     "unist-util-remove-position": "^4.0.0",

test/fixtures/figure-figcaption/index.md

@@ -1,4 +1,4 @@
-![The Pulpit Rock](img\_pulpit.jpg)
+![The Pulpit Rock](img_pulpit.jpg)
 
 Fig1. - A view of the pulpit rock in Norway.