Bump org.apache.activemq:activemq-broker from 5.16.4 to 5.18.3

Bumps [org.apache.activemq:activemq-broker](https://github.com/apache/activemq) from 5.16.4 to 5.18.3.
- [Commits](apache/activemq@activemq-5.16.4...activemq-5.18.3)

---
updated-dependencies:
- dependency-name: org.apache.activemq:activemq-broker
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -52,7 +52,7 @@ dependencies {
     implementation 'org.yaml:snakeyaml:2.2'
     implementation 'net.logstash.logback:logstash-logback-encoder:7.0.1'
     implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.14.2'
-    implementation 'org.apache.activemq:activemq-broker:5.16.4'
+    implementation 'org.apache.activemq:activemq-broker:5.18.3'
     implementation 'org.apache.activemq:activemq-client:5.16.7'
     implementation 'com.sun.mail:javax.mail:1.6.2'
     implementation 'com.google.code.gson:gson:2.10.1'