Add version 5 and 6 maintenance policy
@@ -121,12 +121,23 @@ This project respects semantic versioning.
See http://semver.org/.
+## Version 5.x and 6.x
+This library provides the Spring Boot binding.
+And there are some incompatible changes between Spring Boot 2.x and 3.x.
+As a result, line-bot-sdk-java maintainers maintain two maintenance lines until the end of the life of Spring Boot 2.x.
+
+- line-bot-sdk-java 6.x supports Spring Boot 3.x and Jakarta EE, Java 17+(Branch: master).
+- line-bot-sdk-java 5.x supports Spring Boot 2.x and Java EE, Java 8+(branch: maint/5.x).
+
+Spring Boot 2.x is scheduled for retirement on 2023/11/18. This means that line-bot-sdk-java 5.x will be retired on 2023/11/18.
+https://endoflife.date/spring-boot
+
+We will add new features to line-bot-sdk-java 6.x. But if you send us a backport patch for maint/5.x branch, we might apply it :)
## Contributing
Please check [CONTRIBUTING](CONTRIBUTING.md) before making a contribution.
-
## License
Copyright (C) 2016 LINE Corp.
