update ci

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-    <a href="https://docs.oracle.com/en/java/javase/17/"><img src="https://img.shields.io/badge/Java-Release%2017-green"/></a>
+    <a href="https://docs.oracle.com/en/java/javase/21/"><img src="https://img.shields.io/badge/Java-Release%2021-green"/></a>
     <span>&nbsp;</span>
     <a href="https://jitpack.io/#teletha/sinobu"><img src="https://img.shields.io/jitpack/v/github/teletha/sinobu?label=Repository&color=green"></a>
     <span>&nbsp;</span>
@@ -191,7 +191,7 @@ I.error((Supplier) () -> "Use a lambda expression to delay message building.");
 
 
 ## Prerequisites
-Sinobu runs on all major operating systems and requires only [Java version 17](https://docs.oracle.com/en/java/javase/17/) or later to run.
+Sinobu runs on all major operating systems and requires only [Java version 21](https://docs.oracle.com/en/java/javase/21/) or later to run.
 To check, please run `java -version` on your terminal.
 <p align="right"><a href="#top">back to top</a></p>
 

src/project/java/kiss/Project.java

@@ -45,7 +45,7 @@ public class Project extends bee.api.Project {
                 - Refactoring safety
                 """);
 
-        require(SourceVersion.RELEASE_21, SourceVersion.RELEASE_17);
+        require(SourceVersion.RELEASE_21, SourceVersion.RELEASE_21);
 
         require("com.github.teletha", "antibug").atTest();
         require("com.pgs-soft", "HttpClientMock").atTest();