Update dependency ava to v6

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
     "yargs": "^17.0.0"
   },
   "devDependencies": {
-    "ava": "^3.1.0",
+    "ava": "^6.0.0",
     "c8": "^9.0.0",
     "coveralls": "^3.0.0",
     "eslint": "^8.55.0",