Update dependency @types/node to v13.13.51

Author: renovate-bot

package-lock.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@types/chai": "4.2.17",
     "@types/mocha": "8.2.2",
-    "@types/node": "13.13.50",
+    "@types/node": "13.13.51",
     "husky": "6.0.0",
     "lint-staged": "10.5.4",
     "prettier": "2.2.1",