[FSSDK-10015] chore: Prepare release 4.0.2

EventBuilder.php -> Updated SDK version to 4.0.2 
EventBuilderTest.php -> Updated client version to 4.0.2
CHANGELOG.md -> Added version 4.0.2 details (#291)

Author: FarhanAnjum-opti

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Optimizely PHP SDK Changelog
 
+## 4.0.2
+March 14, 2025
+
+* Fix: Explicitly define class properties #288
+
 ## 4.0.1
 December 4, 2023
 

src/Optimizely/Event/Builder/EventBuilder.php

@@ -39,7 +39,7 @@ class EventBuilder
     /**
      * @const string Version of the Optimizely PHP SDK.
      */
-    const SDK_VERSION = '4.0.1';
+    const SDK_VERSION = '4.0.2';
 
     /**
      * @var string URL to send event to.

tests/EventTests/EventBuilderTest.php

@@ -69,7 +69,7 @@ protected function setUp() : void
                 ]],
                 'revision' => '15',
                 'client_name' => 'php-sdk',
-                'client_version' => '4.0.1',
+                'client_version' => '4.0.2',
                 'anonymize_ip'=> false,
                 'enrich_decisions' => true,
             ];