Update parent POM, update dependencies, test with Java 21 (#89)

Author: gounthar

Jenkinsfile

@@ -2,6 +2,6 @@
 
 /* `buildPlugin` step provided by: https://github.com/jenkins-infra/pipeline-library */
 buildPlugin(useContainerAgent: true, configurations: [
-    [platform: 'linux', jdk: 17],
-    [platform: 'windows', jdk: 11],
+    [platform: 'linux', jdk: 21],
+    [platform: 'windows', jdk: 17],
 ])

pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.73</version>
+    <version>4.74</version>
     <relativePath />
   </parent>
 
@@ -31,7 +31,7 @@
   </scm>
 
   <properties>
-    <revision>3.3.1</revision>
+    <revision>3.3.3</revision>
     <changelist>999999-SNAPSHOT</changelist>
     <jenkins.version>2.361.4</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
@@ -96,11 +96,11 @@
         <!-- Provided by bouncycastle-api-plugin -->
         <exclusion>
           <groupId>org.bouncycastle</groupId>
-          <artifactId>bcpkix-jdk15on</artifactId>
+          <artifactId>bcpkix-jdk18on</artifactId>
         </exclusion>
         <exclusion>
           <groupId>org.bouncycastle</groupId>
-          <artifactId>bcprov-jdk15on</artifactId>
+          <artifactId>bcprov-jdk18on</artifactId>
         </exclusion>
         <!-- Provided by Jenkins core -->
         <exclusion>