chore(package): update ava to version 0.18.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -27,7 +27,7 @@
     "@aureooms/js-array": "^4.0.0",
     "@aureooms/js-functools": "^2.0.3",
     "@aureooms/js-itertools": "^3.1.1",
-    "ava": "^0.17.0",
+    "ava": "^0.18.2",
     "babel-cli": "^6.22.2",
     "babel-polyfill": "^6.22.0",
     "babel-preset-env": "^1.1.8",