chore(package): update ava to version 0.24.0 (#131)

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "babel-runtime": "^6.26.0"
   },
   "devDependencies": {
-    "ava": "^0.23.0",
+    "ava": "^0.24.0",
     "babel-cli": "^6.26.0",
     "babel-eslint": "^8.0.2",
     "babel-plugin-add-module-exports": "^0.2.1",