fix(package): update tail to version 2.0.1

Closes #39

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
   "readmeFilename": "README.md",
   "dependencies": {
     "grunt": "~1.0.1",
-    "tail": "~1.2.3",
+    "tail": "~2.0.1",
     "moment": "~2.20.1",
     "moment-timezone": "~0.5.14",
     "faye": "~1.2.4",