chore(package): update ava to version 0.25.0

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
     "execa": "^0.9.0"
   },
   "devDependencies": {
-    "ava": "^0.24.0",
+    "ava": "^0.25.0",
     "codecov": "^3.0.0",
     "commitizen": "^2.9.6",
     "cz-conventional-changelog": "^2.0.0",