Merge pull request #251 from arangodb/greenkeeper-watch-0.19.1

Update watch to version 0.19.1 🚀

Author: pluma

package.json

@@ -65,7 +65,7 @@
     "npm-run-all": "2.2.0",
     "snazzy": "4.0.0",
     "utf8-length": "0.0.1",
-    "watch": "0.18.0",
+    "watch": "0.19.1",
     "webpack": "1.13.1",
     "xhr": "2.2.0"
   },