fix gpg maven kep issue outlined here: https://stackoverflow.com/questions/53992950/maven-gpg-plugin-failing-with-inappropriate-ioctl-for-device-when-running-unde

Author: SerKnight

pom.xml

@@ -248,14 +248,20 @@
 			<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>
-						<phase>verify</phase>
-						<goals>
+            <id>sign-artifacts</id>
+            <phase>verify</phase>
+            <goals>
 							<goal>sign</goal>
-						</goals>
+            </goals>
+            <configuration>
+							<gpgArguments>
+								<arg>--pinentry-mode</arg>
+								<arg>loopback</arg>
+							</gpgArguments>
+            </configuration>
 					</execution>
 				</executions>
 			</plugin>