Update phpstan/phpstan requirement from 2.1.22 to 2.1.29

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.29
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -7,7 +7,7 @@
         "ext-pmmpthread": "^6.0"
     },
     "require-dev": {
-        "phpstan/phpstan": "2.1.22",
+        "phpstan/phpstan": "2.1.29",
         "phpstan/extension-installer": "^1.0",
         "phpstan/phpstan-strict-rules": "^2.0"
     },