Prepare release v4.2.2

Author: lesleysin

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 4.2.2
+
+- Add cacheTTL to ServerAction and preparePayloadWithDataHash method in ServerActionExecutionCapabilityDelegate
+
 ## 4.2.1
 
 - Added new methods to DuitDataSource extension

pubspec.yaml

@@ -1,6 +1,6 @@
 name: duit_kernel
 description: "Core library for flutter_duit package.  Contains reusable models for developing third-party packages."
-version: 4.2.1
+version: 4.2.2
 repository: https://github.com/lesleysin/duit_kernel
 funding:
   - https://boosty.to/duit_foundation