Start 2.20 branch; update 2.x to 2.21

Author: cowtowncoder

pom.xml

@@ -10,13 +10,13 @@
     <groupId>com.fasterxml.jackson</groupId>
     <!-- this is one of few Jackson modules that depends on parent and NOT jackson-bom -->
     <artifactId>jackson-parent</artifactId>
-    <version>2.20</version>
+    <version>2.21-SNAPSHOT</version>
   </parent>
 
   <groupId>com.fasterxml.jackson.core</groupId>
   <artifactId>jackson-annotations</artifactId>
   <name>Jackson-annotations</name>
-  <version>2.20.1-SNAPSHOT</version>
+  <version>2.21-SNAPSHOT</version>
   <packaging>jar</packaging>
   <description>Core annotations used for value types, used by Jackson data binding package.
   </description>
@@ -82,6 +82,7 @@
         <groupId>org.cyclonedx</groupId>
         <artifactId>cyclonedx-maven-plugin</artifactId>
         <configuration>
+	  <attach>true</attach>
           <skipNotDeployed>true</skipNotDeployed>
           <classifier>sbom-cyclonedx</classifier>
         </configuration>

release-notes/VERSION-2.x

@@ -14,6 +14,10 @@ NOTE: Jackson 3.x components rely on 2.x annotations; there are no separate
 === Releases ===
 ------------------------------------------------------------------------
 
+2.21 (not yet released)
+
+No changes since 2.20
+
 2.20 (28-Aug-2025)
 
 #293: Improve duplicate Id with different associated object error message