JVM 23 in CI

Author: demidko

.github/workflows/gradle.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '23'
           distribution: 'temurin'
 
       # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.

build.gradle.kts

@@ -1,5 +1,6 @@
 @file:Suppress("VulnerableLibrariesLocal", "SpellCheckingInspection")
 
+import org.gradle.api.JavaVersion.VERSION_21
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21
 
 
@@ -27,6 +28,10 @@ kotlin {
     compilerOptions.optIn.add("kotlinx.serialization.ExperimentalSerializationApi")
   }
 }
+java {
+  sourceCompatibility = VERSION_21
+  targetCompatibility = VERSION_21
+}
 tasks.test {
   useJUnitPlatform()
 }