fix(package): update redis to version 3.0.2

Closes #79

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
     "express": "^4.16.3",
     "moment": "^2.21.0",
     "qs": "^6.5.1",
-    "redis": "^2.8.0"
+    "redis": "^3.0.2"
   },
   "devDependencies": {
     "@babel/cli": "^7.0.0-beta.49",