chore(package): update sinon to version 3.2.1

Closes #27

Author: greenkeeper[bot]

package.json

@@ -75,7 +75,7 @@
     "redux": "^3.6.0",
     "rimraf": "^2.6.1",
     "semantic-release": "^6.3.2",
-    "sinon": "^2.1.0"
+    "sinon": "^3.2.1"
   },
   "dependencies": {
     "lodash.compact": "^3.0.1",