Merge pull request #39 from wimpyprogrammer/greenkeeper/sinon-5.1.1

Update sinon to the latest in-range version 🚀

Author: wimpyprogrammer

package.json

@@ -71,7 +71,7 @@
     "react-dom": "*",
     "react-test-renderer": "*",
     "rimraf": "^2.6.2",
-    "sinon": "^5.0.0",
+    "sinon": "^5.1.1",
     "sinon-chai": "^3.0.0",
     "webpack": "^4.13.0"
   },