chore(deps): update dependency eslint to v8

Author: renovate[bot]

apps/lit/package.json

@@ -37,7 +37,7 @@
     "chai": "^4.2.0",
     "deepmerge": "^4.2.2",
     "es-dev-server": "^1.23.1",
-    "eslint": "^6.7.2",
+    "eslint": "^8.0.0",
     "karma": "^4.4.1",
     "karma-chai": "^0.1.0",
     "karma-mocha": "^1.3.0",