chore(deps): update dependency phan/phan to v6 (#1894)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

vendor-bin/phan/composer.json

@@ -1,5 +1,5 @@
 {
     "require-dev": {
-        "phan/phan": "^5.4"
+        "phan/phan": "^6.0"
     }
 }