chore: bump validators to 0.2.* and fix security vulnerabilities

Update utopia-php/validators from 0.1.* to 0.2.* and resolve security
advisories in dev dependencies by upgrading phpunit (9.6.31 → 9.6.34)
and symfony/process (8.0.3 → 8.0.5).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: loks0n

composer.json

@@ -31,7 +31,7 @@
         "php": ">=8.1",
         "ext-swoole": "*",
         "utopia-php/servers": "0.2.*",
-        "utopia-php/validators": "0.1.*",
+        "utopia-php/validators": "0.2.*",
         "utopia-php/compression": "0.1.*",
         "utopia-php/telemetry": "0.2.*"
     },