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

Closes #81

Author: greenkeeper[bot]

package.json

@@ -16,7 +16,7 @@
   "dependencies": {},
   "devDependencies": {
     "@types/jest": "^24.0.0",
-    "@types/node": "^13.1.0",
+    "@types/node": "^14.0.9",
     "del-cli": "^3.0.0",
     "husky": "^4.0.2",
     "jest": "^23.6.0",