chore(package): update @types/node to version 11.9.5

Closes #11

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@types/jest": "^23.1.3",
     "@types/micro": "^7.3.1",
-    "@types/node": "^10.3.6",
+    "@types/node": "^11.9.5",
     "husky": "^0.14.3",
     "jest": "^23.2.0",
     "prettier": "^1.13.6",