Merge pull request #11 from marko-js/greenkeeper/chai-4.1.0

Update chai to the latest version 🚀

Author: austinkelleher

package.json

@@ -22,7 +22,7 @@
     "marko-html-util": "^1.0.0"
   },
   "devDependencies": {
-    "chai": "~4.0.2",
+    "chai": "~4.1.0",
     "jshint": "^2.9.3",
     "mocha": "~3.3.0",
     "through": "^2.3.4",