chore(deps): update dependency ava to v0.25.0 (#22)

Author: renovate[bot]

package.json

@@ -28,7 +28,7 @@
     "@aureooms/js-functools": "2.0.3",
     "@aureooms/js-itertools": "3.4.0",
     "@aureooms/js-number": "3.1.0",
-    "ava": "0.19.1",
+    "ava": "0.25.0",
     "babel-cli": "6.26.0",
     "babel-polyfill": "6.26.0",
     "babel-preset-env": "1.7.0",