Merge pull request #165 from Munter/greenkeeper-unexpected-sinon-10.2.1

Update unexpected-sinon to version 10.2.1 🚀

package.json

@@ -64,6 +64,6 @@
     "stylus": "0.52.4",
     "swig": "1.4.2",
     "unexpected": "10.0.2",
-    "unexpected-sinon": "8.0.0"
+    "unexpected-sinon": "10.2.1"
   }
 }