chore(package): update eslint-plugin-ava to version 5.1.1

Closes #75

Author: greenkeeper[bot]

Diff for: package.json

@@ -34,7 +34,7 @@
     "babel-preset-env": "^1.6.0",
     "babel-register": "^6.9.0",
     "eslint": "^4.1.1",
-    "eslint-plugin-ava": "^4.2.1",
+    "eslint-plugin-ava": "^5.1.1",
     "eslint-plugin-import": "^2.6.0",
     "eslint-plugin-itgalaxy": "^65.0.0",
     "eslint-plugin-jest": "^21.2.0",