Update to 26.2

build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     `java-library`
-    id("io.github.goooler.shadow") version "8.1.8"
+    id("com.gradleup.shadow") version "9.6.1"
     id("com.github.ben-manes.versions") version "0.52.0"
 }
 
@@ -15,7 +15,7 @@ subprojects {
 
     java {
         toolchain {
-            languageVersion.set(JavaLanguageVersion.of(21))
+            languageVersion.set(JavaLanguageVersion.of(25))
         }
     }