fix(deps): update dependency open-feature/flagd-provider to ^0.3.0

Author: renovate[bot]

Diff for: integration/composer.json

@@ -17,7 +17,7 @@
     "require": {
         "php": "^7.4 || ^8",
         "open-feature/sdk": "^1.1.1",
-        "open-feature/flagd-provider": "^0.2.0",
+        "open-feature/flagd-provider": "^0.3.0",
         "guzzlehttp/guzzle": "^7.5",
         "guzzlehttp/psr7": "^2.4"
     },