JCR-5146: Add mixin constants - fix package version

Author: reschke

jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/package-info.java

@@ -14,5 +14,5 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@org.osgi.annotation.versioning.Version("2.2")
+@org.osgi.annotation.versioning.Version("2.3")
 package org.apache.jackrabbit;