fix(package): update bottleneck to version 2.2.0

Closes #78

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
   "dependencies": {
     "aws-sdk": "^2.58.0",
     "babel-runtime": "^6.23.0",
-    "bottleneck": "^1.15.1",
+    "bottleneck": "^2.2.0",
     "debug": "^3.1.0",
     "lodash.isempty": "^4.2.1"
   },