chore(package): update testee to version 0.4.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "steal": "^0.16.43",
     "steal-qunit": "0.1.4",
     "steal-tools": "^0.16.8",
-    "testee": "^0.3.0",
+    "testee": "^0.4.0",
     "todomvc-app-css": "^2.0.6",
     "todomvc-common": "^1.0.2"
   },