Merge pull request #94 from bem-sdk/greenkeeper/ava-0.19.0

Update ava to the latest version 🚀

Author: blond

package.json

@@ -33,7 +33,7 @@
     "es6-error": "4.0.2"
   },
   "devDependencies": {
-    "ava": "^0.18.0",
+    "ava": "^0.19.0",
     "coveralls": "^2.11.9",
     "eslint": "^3.0.0",
     "eslint-config-pedant": "^0.8.0",