Upgrade ava

Author: RyanZim

package.json

@@ -24,7 +24,7 @@
     "resolve": "^1.1.7"
   },
   "devDependencies": {
-    "ava": "^0.19.1",
+    "ava": "^0.22.0",
     "eslint": "^3.19.0",
     "eslint-config-i-am-meticulous": "^6.0.1",
     "eslint-plugin-import": "^2.2.0",