Bump php-sdk to version v2.5.7

Author: jderusse

Diff for: CHANGELOG

@@ -1,6 +1,10 @@
 CHANGELOG
 =========
 
+* v2.5.7 (2025-01-28)
+
+  - Fix deprecations in return type declaration
+
 * v2.5.6 (2025-01-10)
 
   - [sdk] implement ProfileNotReadyException

Diff for: src/Blackfire/Client.php

@@ -28,7 +28,7 @@ class Client
 {
     const MAX_RETRY = 60;
     const NO_REFERENCE_ID = '00000000-0000-0000-0000-000000000000';
-    const VERSION = '2.5.6';
+    const VERSION = '2.5.7';
 
     private $config;
     private $collabTokens;