chore(deps): update typescript-eslint monorepo to v2.31.0

Author: renovate-bot

package-lock.json

@@ -26,8 +26,8 @@
     "@nestjs/common": "7.0.9",
     "@nestjs/core": "7.0.9",
     "@types/node": "12.12.31",
-    "@typescript-eslint/eslint-plugin": "2.30.0",
-    "@typescript-eslint/parser": "2.30.0",
+    "@typescript-eslint/eslint-plugin": "2.31.0",
+    "@typescript-eslint/parser": "2.31.0",
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.11.0",
     "eslint-plugin-import": "2.20.2",