chore(package): update ava to version 0.25.0 (#29)

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "url-join": "^3.0.0"
   },
   "devDependencies": {
-    "ava": "^0.24.0",
+    "ava": "^0.25.0",
     "clear-module": "^2.1.0",
     "codecov": "^3.0.0",
     "commitizen": "^2.9.6",