Adding maven-gpg-plugin and updating to Apache parent pom version 18
<parent>
<groupId>org.apache</groupId>
<artifactId>apache</artifactId>
- <version>13</version>
+ <version>18</version>
</parent>
<properties>
</dependency>
</dependencies>
</plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-gpg-plugin</artifactId>
+ <executions>
+ <execution>
+ <id>sign-artifacts</id>
+ <phase>verify</phase>
+ <goals>
+ <goal>sign</goal>
+ </goals>
+ </execution>
+ </executions>
+ </plugin>
</plugins>
</build>
</profile>
