chore(package): update ava to version 0.19.1

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "@aureooms/js-in-situ-sort-spec": "^7.0.2",
     "@aureooms/js-partition": "^8.0.0",
-    "ava": "^0.18.2",
+    "ava": "^0.19.1",
     "babel-cli": "^6.23.0",
     "babel-polyfill": "^6.23.0",
     "babel-preset-latest": "^6.22.0",