chore(package): update @types/node to version 11.9.2

Closes #280

Author: greenkeeper[bot]

package.json

@@ -86,7 +86,7 @@
     "@commitlint/cli": "^7.1.2",
     "@commitlint/config-conventional": "^7.1.2",
     "@types/jest": "^23.3.2",
-    "@types/node": "^10.11.0",
+    "@types/node": "^11.9.2",
     "colors": "^1.3.2",
     "commitizen": "^3.0.0",
     "coveralls": "^3.0.2",