chore(deps): update typescript-eslint monorepo to v6.21.0

Author: renovate[bot]

package-lock.json

@@ -34,8 +34,8 @@
     "@types/chai": "4.3.11",
     "@types/mocha": "10.0.6",
     "@types/node": "20.11.16",
-    "@typescript-eslint/eslint-plugin": "6.20.0",
-    "@typescript-eslint/parser": "6.20.0",
+    "@typescript-eslint/eslint-plugin": "6.21.0",
+    "@typescript-eslint/parser": "6.21.0",
     "chai": "5.0.3",
     "esbuild": "0.20.0",
     "esbuild-register": "3.5.0",