Update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -45,7 +45,7 @@
     "microbundle": "^0.15.1",
     "@babel/eslint-parser": "^10.0.3 || ^7.11.0",
     "cross-env": "^7.0.2",
-    "eslint": "^6.8.0",
+    "eslint": "^6.8.0 || ^9.0.0",
     "eslint-config-prettier": "^6.7.0 || ^8.0.0",
     "eslint-config-standard": "^14.1.0",
     "eslint-config-standard-react": "^9.2.0",