Add plugins for deployment

Author: takaoka-k-wap

pom.xml

@@ -33,7 +33,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-javadoc-plugin</artifactId>
-            <version>3.1.0</version>
+            <version>3.0.0-M1</version>
             <configuration>
               <source>${java.version}</source>
               <locale>en_US</locale>
@@ -48,6 +48,37 @@
               </execution>
             </executions>
           </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-gpg-plugin</artifactId>
+            <version>1.6</version>
+            <executions>
+              <execution>
+                <id>sign-artifacts</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+                <configuration>
+                  <gpgArguments>
+                    <arg>--pinentry-mode</arg>
+                    <arg>loopback</arg>
+                  </gpgArguments>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+          <plugin>
+            <groupId>org.sonatype.plugins</groupId>
+            <artifactId>nexus-staging-maven-plugin</artifactId>
+            <version>1.6.8</version>
+            <extensions>true</extensions>
+            <configuration>
+              <serverId>ossrh</serverId>
+              <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+              <autoReleaseAfterClose>true</autoReleaseAfterClose>
+            </configuration>
+          </plugin>
         </plugins>
       </build>
     </profile>