Update dependency vimeo/psalm to v6

| datasource | package     | from   | to    |
| ---------- | ----------- | ------ | ----- |
| packagist  | vimeo/psalm | 5.26.1 | 6.0.0 |

Author: renovate[bot]

composer.json

@@ -34,7 +34,7 @@
         "react/http": "^1.10",
         "roave/security-advisories": "dev-latest",
         "squizlabs/php_codesniffer": "^3.10.3",
-        "vimeo/psalm": "^5.26.1"
+        "vimeo/psalm": "^6.0.0"
     },
     "conflict": {
         "php-http/httplug": "<2.4.1"