chore(package): update sinon-chai to version 3.5.0

Closes #347

Author: greenkeeper[bot]

package.json

@@ -80,7 +80,7 @@
     "replace-bundle-webpack-plugin": "^1.0.0",
     "script-ext-html-webpack-plugin": "^2.0.0",
     "sinon": "^4.2.1",
-    "sinon-chai": "^2.9.0",
+    "sinon-chai": "^3.5.0",
     "source-map-loader": "^0.2.1",
     "style-loader": "^0.21.0",
     "url-loader": "^1.0.0",