Merge remote-tracking branch 'origin/greenkeeper/sinon-3.2.1'

Author: Tom Kirkpatrick

package.json

@@ -56,7 +56,7 @@
     "nyc": "11.1.0",
     "semantic-release": "7.0.1",
     "serve-favicon": "2.4.3",
-    "sinon": "2.3.7",
+    "sinon": "3.2.1",
     "sinon-chai": "2.12.0",
     "strong-error-handler": "2.2.0",
     "supertest": "3.0.0",