build(deps-dev): bump phpstan/phpstan from 2.1.28 to 2.1.29 (#201)

Author: dependabot[bot]

composer.json

@@ -8,7 +8,7 @@
     "ext-igbinary": "*"
   },
   "require-dev": {
-    "phpstan/phpstan": "2.1.28"
+    "phpstan/phpstan": "2.1.29"
   },
   "autoload": {
     "psr-4": {