chore(package): update ava to version 0.25.0

Closes #31

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "inquirer": "^3.2.1"
   },
   "devDependencies": {
-    "ava": "^0.22.0",
+    "ava": "^0.25.0",
     "eslint": "^4.6.1"
   }
 }