chore(package): update @types/node to version 11.9.3

Closes #14

Author: greenkeeper[bot]

package.json

@@ -86,7 +86,7 @@
     "@types/jest": "^23.1.3",
     "@types/lodash.assign": "^4.2.3",
     "@types/lodash.omit": "^4.5.3",
-    "@types/node": "^10.0.3",
+    "@types/node": "^11.9.3",
     "colors": "^1.1.2",
     "commitizen": "^2.9.6",
     "coveralls": "^3.0.0",