Update typescript-eslint monorepo to v8

Author: renovate[bot]

package.json

@@ -24,8 +24,8 @@
   "devDependencies": {
     "@types/chai": "4.2.18",
     "@types/mocha": "7.0.2",
-    "@typescript-eslint/eslint-plugin": "2.34.0",
-    "@typescript-eslint/parser": "2.34.0",
+    "@typescript-eslint/eslint-plugin": "8.23.0",
+    "@typescript-eslint/parser": "8.23.0",
     "chai": "4.3.4",
     "eslint": "6.8.0",
     "mocha": "7.2.0",