chore(package): update @types/node to version 7.0.28

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "@types/lodash": "4.14.65",
     "@types/mocha": "2.2.41",
     "@types/mz": "0.0.31",
-    "@types/node": "7.0.27",
+    "@types/node": "7.0.28",
     "@types/object-hash": "0.5.28",
     "@types/rimraf": "0.0.28",
     "@types/sinon": "2.3.0",