Micronaut 5 compatibility and release prep (#673)

* update to kotlin 2.2.20

* update ksp gradle

* update baseline to java 21

* update workflow to java 21

* add junit platform

* move java-library to objectstorage-example.gradle

* use junit platform in buildSrc build

* update micronaut build to 8.0.0-M6

* use baseline plugin

* remove unused java

* remove unused junit

* revert changes

---------

Co-authored-by: Sergio del Amo <[email protected]>

Author: lissam1

.github/workflows/aws.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: ['17']
+        java: ['21']
     steps:
        # https://github.com/actions/virtual-environments/issues/709
       - name: Free disk space

.github/workflows/azure.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: ['17']
+        java: ['21']
     steps:
        # https://github.com/actions/virtual-environments/issues/709
       - name: Free disk space

.github/workflows/gcp.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: ['17']
+        java: ['21']
     permissions:
       contents: 'read'
       id-token: 'write'

.github/workflows/oci.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: ['17']
+        java: ['21']
     permissions:
       contents: 'read'
       id-token: 'write'

doc-examples/example-kotlin/build.gradle.kts

@@ -1,18 +1,8 @@
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
-
 plugins {
     id("org.jetbrains.kotlin.jvm")
     id("com.google.devtools.ksp")
     id("io.micronaut.build.internal.objectstorage-example")
-}
-
-java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
-}
-
-kotlin {
-    this.compilerOptions.jvmTarget.set(JvmTarget.JVM_17)
+    id("io.micronaut.build.internal.kotlin-base")
 }
 
 dependencies {

gradle/libs.versions.toml

@@ -18,8 +18,8 @@ bytebuddy = '1.17.8'
 
 # Gradle plugins
 micronaut-gradle-plugin = "4.5.5"
-kotlin-gradle-plugin = "1.9.25"
-kotlin-gradle-ksp-plugin = "1.9.25-1.0.20"
+kotlin-gradle-plugin = "2.2.20"
+kotlin-gradle-ksp-plugin = "2.2.20-2.0.4"
 
 [libraries]
 # Core

test-suite-utils/build.gradle.kts

@@ -1,7 +1,4 @@
 plugins {
     java
-}
-java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    id ("io.micronaut.build.internal.java-base")
 }