Updates version of maven gpg plugin (#774)

Author: aaronzi

pom.xml

@@ -1403,7 +1403,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>1.5</version>
+						<version>3.2.7</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>