Update eslint to v8.21.0

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | eslint  | 8.20.0 | 8.21.0 |

Author: renovate[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "config.js"
   ],
   "devDependencies": {
-    "eslint": "8.20.0",
+    "eslint": "8.21.0",
     "jest": "28.1.3",
     "prettier": "2.7.1",
     "stylelint": "13.7.2",