chore(package): update testee to version 0.9.0

Author: greenkeeper[bot]

package.json

@@ -55,6 +55,6 @@
     "steal": "^1.11.8",
     "steal-qunit": "^1.0.1",
     "steal-tools": "^1.11.9",
-    "testee": "^0.8.0"
+    "testee": "^0.9.0"
   }
 }