[FSSDK-11964] chore: prepare release 5.2.0 (#613)

* feat: upgrade to version 5.2.0 and add new features, enhancements, and API changes in the Changelog and README files

* clean up

* clean up

Author: muzahidul-opti

.github/workflows/swift.yml

@@ -17,7 +17,7 @@ on:
         description: release
 
 env:
-  VERSION: 5.1.1
+  VERSION: 5.2.0
 
 jobs:
 

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Optimizely Swift SDK Changelog
 
+## 5.2.0
+Dec 19th, 2025
+
+### New Features
+- **CMAB (Contextual Multi-Armed Bandit) Support**: Added support for CMAB experiments with new configuration options and cache control ([#599](https://github.com/optimizely/swift-sdk/pull/599), [#600](https://github.com/optimizely/swift-sdk/pull/600), [#601](https://github.com/optimizely/swift-sdk/pull/601), [#602](https://github.com/optimizely/swift-sdk/pull/602), [#603](https://github.com/optimizely/swift-sdk/pull/603), [#609](https://github.com/optimizely/swift-sdk/pull/609), [#610](https://github.com/optimizely/swift-sdk/pull/610), [#614](https://github.com/optimizely/swift-sdk/pull/614))
+- **Add Holdouts Feature**: Add Holdout support for feature experimentation. ([#577](https://github.com/optimizely/swift-sdk/pull/577), [#577](https://github.com/optimizely/swift-sdk/pull/577), [#578](https://github.com/optimizely/swift-sdk/pull/578), [#587](https://github.com/optimizely/swift-sdk/pull/587))
+- **Multi-Region Support for Data Hosting**: Added SDK support for multi-region data hosting ([#606](https://github.com/optimizely/swift-sdk/pull/606))
+
+### API Changes
+- **Client Initialization**: Custom `CmabConfig` struct can be injected when initializing client. ([#610](https://github.com/optimizely/swift-sdk/pull/610))
+- **Decide Async support**: New `decideAsync` method added to support CMAB decision. ([#602](https://github.com/optimizely/swift-sdk/pull/602))
+- **New Decide Options**: `ignoreCmabCache`, `resetCmabCache`, `invalidateUserCmabCache` for CMAB cache control. ([#601](https://github.com/optimizely/swift-sdk/pull/601))
+  
 ## 5.1.1
 Jun 2th, 2025
 

README.md

@@ -39,7 +39,7 @@ If you have a name conflict with other swift packages when you add the Optimizel
 #### CocoaPods 
 1. Add the following lines to the _Podfile_:<pre>
 ```use_frameworks!```
-```pod 'OptimizelySwiftSDK', '~> 5.1.1'```
+```pod 'OptimizelySwiftSDK', '~> 5.2.0'```
 </pre>
 
 2. Run the following command: <pre>``` pod install ```</pre>