Make sure @eslint/js plugin is installed too

Author: bhousel

bun.lock

@@ -35,6 +35,7 @@
     "lint": "eslint ./src/diff3.mjs ./test/*.js"
   },
   "devDependencies": {
+    "@eslint/js": "^9.38.0",
     "@types/bun": "^1.3.0",
     "eslint": "^9.38.0",
     "npm-run-all2": "^8.0.4"