chore(package): update @types/node to version 14.0.9

Closes #161

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
   },
   "devDependencies": {
     "@types/jest": "^23.0.0",
-    "@types/node": "^10.11.4",
+    "@types/node": "^14.0.9",
     "commitizen": "^3.0.0",
     "coveralls": "^3.0.0",
     "cross-env": "^5.0.0",