chore(package): update yeoman-test to version 2.4.1

Closes #34

Author: greenkeeper[bot]

package.json

@@ -40,6 +40,6 @@
     "gulp-tag-version": "^1.3.0",
     "mocha": "^3.1.2",
     "yeoman-assert": "^3.0.0",
-    "yeoman-test": "^1.0.0"
+    "yeoman-test": "^2.4.1"
   }
 }