fix(package): update @types/node to version 13.13.1

Closes #138

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "@types/mime": "^2.0.0",
     "@types/morgan": "^1.7.35",
     "@types/mysql": "^2.15.2",
-    "@types/node": "^11.9.0",
+    "@types/node": "^13.13.1",
     "@types/serve-favicon": "^2.2.30",
     "body-parser": "^1.18.2",
     "celebrate": "^8.0.0",