chore(package): update yeoman-test to version 2.3.0

Closes #34

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "fs-extra": "^2.1.2",
     "jshint": "^2.8.0",
     "mocha": "^3.2.0",
-    "yeoman-test": "^1.6.0",
+    "yeoman-test": "^2.3.0",
     "yeoman-assert": "3.1.0"
   }
 }