Update version from 4.1.2 to 4.2.0

Author: mbuckton

pom.xml

@@ -25,7 +25,7 @@
   <groupId>io.mapsmessaging</groupId>
   <artifactId>maps</artifactId>
   <modelVersion>4.0.0</modelVersion>
-  <version>4.1.2</version>
+  <version>4.2.0</version>
   <packaging>jar</packaging>
 
   <name>Maps Messaging Server</name>