Upgrade ava to 1.0.0-rc.2

Author: ehmicky

package-lock.json

@@ -50,7 +50,7 @@
     "supports-color": "^5.5.0"
   },
   "devDependencies": {
-    "ava": "^1.0.0-rc.1",
+    "ava": "^1.0.0-rc.2",
     "coveralls": "^3.0.2",
     "cross-spawn": "^6.0.5",
     "eslint": "^5.9.0",