[#67] Configure GPG plugin for publishing.

Author: korydraughn

pom.xml

@@ -136,6 +136,31 @@
 					</execution>
 				</executions>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-gpg-plugin</artifactId>
+				<version>3.2.7</version>
+				<executions>
+					<execution>
+						<id>sign-artifacts</id>
+						<phase>verify</phase>
+						<goals>
+							<goal>sign</goal>
+						</goals>
+						<configuration>
+							<!--
+							The following properties must be defined by your settings.xml file.
+							See the following URLs for additional information.
+							
+							https://central.sonatype.org/publish/publish-maven/#gpg-signed-components
+							https://maven.apache.org/plugins/maven-gpg-plugin/usage.html
+							-->
+							<keyname>${gpg.keyname}</keyname>
+							<passphraseServerId>${gpg.keyname}</passphraseServerId>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 		</plugins>
 	</build>
 </project>