Merge pull request #27 from jenkinsci/support-jdk-21

Support building on Java 21

Author: froque

Jenkinsfile

@@ -4,7 +4,7 @@
 buildPlugin(
   useContainerAgent: false,
   configurations: [
-    [platform: 'linux', jdk: 17],
-    [platform: 'windows', jdk: 11],
+    [platform: 'linux', jdk: 21],
+    [platform: 'windows', jdk: 17],
   ]
-)
+)

pom.xml

@@ -3,7 +3,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.66</version>
+    <version>4.73</version>
   </parent>
 
   <artifactId>powershell</artifactId>
@@ -39,7 +39,6 @@
   </scm>
 
   <properties>
-    <java.level>11</java.level>
     <jenkins.version>2.361.4</jenkins.version>
   </properties>
 
@@ -56,4 +55,4 @@
       <url>https://repo.jenkins-ci.org/public/</url>
     </pluginRepository>
   </pluginRepositories>
-</project>
+</project>