chore(deps): update dependency eslint to v8

Author: renovate-bot

package.json

@@ -57,7 +57,7 @@
     "c8": "^7.3.0",
     "chai": "^4.2.0",
     "cross-env": "^7.0.2",
-    "eslint": "^7.0.0",
+    "eslint": "^8.0.0",
     "eslint-plugin-import": "^2.20.1",
     "eslint-plugin-node": "^11.0.0",
     "gts": "^3.0.0",