Fix Psalm version

Author: viktorprogger

composer.json

@@ -52,7 +52,7 @@
         "rector/rector": "^2.0",
         "roave/infection-static-analysis-plugin": "^1.34",
         "spatie/phpunit-watcher": "^1.23",
-        "vimeo/psalm": "^6.0",
+        "vimeo/psalm": "^5.20||^6.0",
         "yiisoft/test-support": "^3.0",
         "yiisoft/yii-debug": "dev-master"
     },