chore(package): update sinon-chai to version 3.1.0

Closes #96

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "mocha": "^5.0.0",
     "pre-commit": "^1.2.2",
     "sinon": "^4.0.0",
-    "sinon-chai": "^2.8.0"
+    "sinon-chai": "^3.1.0"
   },
   "repository": "[email protected]:Moveo/minimize.git",
   "keywords": [