fixup! tools: update doctool dependencies, migrate to ESM

Refs: vfile/to-vfile#17

tools/doc/addon-verify.mjs

@@ -5,7 +5,6 @@
 // Triggered from the build-addons target in the Makefile and vcbuild.bat.
 
 import { mkdir, writeFile } from 'fs/promises';
-import { fileURLToPath } from 'url';
 
 import gfm from 'remark-gfm';
 import remarkParse from 'remark-parse';
@@ -16,7 +15,7 @@ const rootDir = new URL('../../', import.meta.url);
 const doc = new URL('./doc/api/addons.md', rootDir);
 const verifyDir = new URL('./test/addons/', rootDir);
 
-const file = toVFile.readSync(fileURLToPath(doc), 'utf8');
+const file = toVFile.readSync(doc, 'utf8');
 const tree = unified().use(remarkParse).use(gfm).parse(file);
 const addons = {};
 let id = 0;

tools/doc/package.json

@@ -15,7 +15,7 @@
     "remark-html": "13.0.1",
     "remark-parse": "^9.0.0",
     "remark-rehype": "8.1.0",
-    "to-vfile": "7.0.0",
+    "to-vfile": "7.1.0",
     "unified": "9.2.1",
     "unist-util-select": "4.0.0",
     "unist-util-visit": "3.1.0"