Update maven-gpg-plugin version to 1.6

upgrade to version 1.6 and add the loopback configuration. This tells GPG 2.2.4: "Trust the script, don't ask for a UI popup."

Signed-off-by: RamukaRitik <ritik.ramuka@docusign.com>

Author: RamukaRitik

pom.xml

@@ -298,7 +298,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>1.5</version>
+                <version>1.6</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>