chore(package): update @types/node to version 11.10.4

Closes #37

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "@types/chai": "^4.1.4",
     "@types/dateformat": "^1.0.1",
     "@types/mocha": "^5.2.5",
-    "@types/node": "^10.7.0",
+    "@types/node": "^11.10.4",
     "benchmark": "^2.1.4",
     "chai": "^4.2.0",
     "codecov": "^3.0.4",