Merge pull request #323 from gradle/tb/jdk-21

Update workflows to build with JDK 21

Author: tylerbertrand

.github/workflows/build-verification.yml

@@ -9,10 +9,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v5
-      - name: Set up JDK 8
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '8'
+          java-version: '21'
           distribution: 'temurin'
       - name: Build and publish to Maven Local with Maven
         run: ./mvnw clean install -B
@@ -31,10 +31,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v5
-      - name: Set up JDK 8
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '8'
+          java-version: '21'
           distribution: 'temurin'
       - name: Download plugin to maven local
         uses: actions/download-artifact@v5

pom.xml

@@ -93,8 +93,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.14.1</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <release>8</release>
                     <annotationProcessorPaths>
                         <path>
                             <groupId>org.eclipse.sisu</groupId>