fix(package): update redis to version 3.0.1

Closes #41

Author: greenkeeper[bot]

package.json

@@ -8,7 +8,7 @@
     "hot-shots": "^5.0.0",
     "lodash": "^4.16.2",
     "normalize-registry-metadata": "^1.1.2",
-    "redis": "^2.6.2",
+    "redis": "^3.0.1",
     "request": "^2.75.0",
     "rollbar": "^2.3.9"
   },