Upgraded locked reference to vimeo/psalm

Author: Ocramius

composer.json

@@ -34,7 +34,7 @@
         "doctrine/coding-standard":     "^9.0.0",
         "phpbench/phpbench":            "^1.0.3",
         "infection/infection":          "^0.23.0",
-        "vimeo/psalm":                  "^4.4.1",
+        "vimeo/psalm":                  "^4.8.1",
         "codelicia/xulieta":            "^0.1.6"
     },
     "suggest": {