chore(package): update steal-tools to version 2.0.9

Closes #45

Author: greenkeeper[bot]

package.json

@@ -54,7 +54,7 @@
     "jshint": "^2.9.1",
     "steal": "^1.11.8",
     "steal-qunit": "^1.0.1",
-    "steal-tools": "^1.11.9",
+    "steal-tools": "^2.0.9",
     "testee": "^0.8.0"
   }
 }