chore(package): update ava to version 0.25.0

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "@types/node": "^9.3.0",
     "@types/prop-types": "15.5.2",
     "@types/react": "^16.0.21",
-    "ava": "^0.24.0",
+    "ava": "^0.25.0",
     "babel-core": "^6.26.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-register": "^6.26.0",