chore(package): update riot to version 2.6.5

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -24,7 +24,7 @@
     "mocha": "^2.2.5",
     "mock-xhr": "^0.1.0",
     "requisite": "1.16.1",
-    "riot": "2.3.12",
+    "riot": "2.6.5",
     "shortcake": "^1.1.7",
     "uglify-js": "^2.4.23",
     "xhr2": "^0.1.2"