Moved build to JDK 8 and test to JDK 11

.github/workflows/build.yml

@@ -16,10 +16,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Set up JDK 11
+      - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 1.8
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0

.github/workflows/release.yml

@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Set up JDK 11
+      - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 1.8
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0

README.asciidoc

@@ -7,8 +7,6 @@
 ====
 **Breaking Changes!**
 
-Source and target compatibility of the library was changed to **Java 11**.
-
 The default configuration was adapted for **Jakarta XML Binding 3.0.1**.
 ====
 

build.gradle.kts

@@ -86,8 +86,8 @@ pluginBundle {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
 // set correct project status
@@ -108,6 +108,9 @@ tasks {
             [email protected](org.gradle.api.tasks.testing.logging.TestLogEvent.FAILED)
         }
 
+        this.javaLauncher.set( project.javaToolchains.launcherFor {
+            languageVersion.set(JavaLanguageVersion.of(11))
+        })
             systemProperty("intershop.gradle.versions","6.8, 7.0.2")
 
             if(project.hasProperty("repoURL")
@@ -270,6 +273,6 @@ dependencies {
     implementation(gradleApi())
     implementation(gradleKotlinDsl())
 
-    testImplementation("com.intershop.gradle.test:test-gradle-plugin:4.0.0")
+    testImplementation("com.intershop.gradle.test:test-gradle-plugin:4.1.0")
     testImplementation(gradleTestKit())
 }