chore(package): update @types/node to version 14.0.7

Closes #23

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "@types/mocha": "^7.0.2",
-    "@types/node": "^13.9.0",
+    "@types/node": "^14.0.7",
     "conventional-changelog-cli": "^2.0.31",
     "mocha": "^7.1.0",
     "nyc": "^15.0.0",