Update xo

Author: wooorm

package.json

@@ -46,7 +46,7 @@
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
     "unist-util-visit": "^3.0.0",
-    "xo": "^0.39.0"
+    "xo": "^0.42.0"
   },
   "scripts": {
     "prepack": "npm run build && npm run format",

test.js

@@ -3,7 +3,7 @@
  * @typedef {import('unist-util-visit').Visitor<Node>} Visitor
  */
 
-import assert from 'assert'
+import assert from 'node:assert'
 import test from 'tape'
 import {retext} from 'retext'
 import {visit} from 'unist-util-visit'