Merge pull request #1914 from Maps-Messaging/dependabot/maven/development/com.hivemq-hivemq-mqtt-client-1.3.9

Bump com.hivemq:hivemq-mqtt-client from 1.3.8 to 1.3.9

Author: mbuckton

pom.xml

@@ -977,7 +977,7 @@
     <dependency>
       <groupId>com.hivemq</groupId>
       <artifactId>hivemq-mqtt-client</artifactId>
-      <version>1.3.8</version>
+      <version>1.3.9</version>
       <scope>test</scope>
     </dependency>