Update parent POM, update dependencies, test with Java 21 (#105)

* Test with Java 21.

* Bump parent pom.

* Bump bom version.

* Bump bom version.

* Update required: Script Security Plugin (script-security 1189.vb_a_b_7c8fd5fde) to be updated to 1229.v4880b_b_e905a_6 or higher

* Bump script-security from 1189.vb_a_b_7c8fd5fde to 1244.ve463715a_f89c

Jenkinsfile

@@ -5,6 +5,6 @@
 buildPlugin(
   useContainerAgent: true,
   configurations: [
-    [platform: 'linux', jdk: 17],
-    [platform: 'windows', jdk: 11]
+    [platform: 'linux', jdk: 21],
+    [platform: 'windows', jdk: 17]
 ])

pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.62</version>
+    <version>4.74</version>
     <relativePath/>
   </parent>
 
@@ -54,9 +54,10 @@
     <dependencies>
       <dependency>
         <!-- Pick up common dependencies for the selected LTS line: https://github.com/jenkinsci/bom#usage -->
-        <groupId>io.jenkins.tools.bom</groupId>
-        <artifactId>bom-2.361.x</artifactId>
-        <version>1750.v0071fa_4c4a_e3</version>
+        <!-- https://mvnrepository.com/artifact/io.jenkins.tools.bom/bom-2.361.x -->
+          <groupId>io.jenkins.tools.bom</groupId>
+          <artifactId>bom-2.361.x</artifactId>
+          <version>2102.v854b_fec19c92</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -73,7 +74,7 @@
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>script-security</artifactId>
-      <version>1189.vb_a_b_7c8fd5fde</version>
+      <version>1244.ve463715a_f89c</version>
     </dependency>
 
     <dependency>