chore(package): update eslint-plugin-ava to version 5.1.0

Closes #47

Author: greenkeeper[bot]

package.json

@@ -65,7 +65,7 @@
     "coveralls": "^3.0.0",
     "cz-conventional-changelog": "^2.0.0",
     "eslint": "^5.1.0",
-    "eslint-plugin-ava": "^4.2.2",
+    "eslint-plugin-ava": "^5.1.0",
     "fetch-mock": "^6.5.0",
     "husky": "^0.14.3",
     "nyc": "^12.0.2",