update pom for release to maven central

Author: Debabrata Acharya

pom.xml

@@ -6,9 +6,15 @@
 
     <name>NSGA-II</name>
 
+    <parent>
+        <artifactId>oss-parent</artifactId>
+        <groupId>org.sonatype.oss</groupId>
+        <version>9</version>
+    </parent>
+
     <groupId>com.debacharya</groupId>
     <artifactId>nsgaii</artifactId>
-    <version>3.0</version>
+    <version>3.0.1</version>
     <packaging>jar</packaging>
 
     <inceptionYear>2019</inceptionYear>
@@ -34,6 +40,17 @@
         <system>GitHub Issues</system>
     </issueManagement>
 
+    <distributionManagement>
+        <snapshotRepository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </snapshotRepository>
+        <repository>
+            <id>ossrh</id>
+            <url>https://oss.sonatype.org/service/local/staging/deploy/maven2</url>
+        </repository>
+    </distributionManagement>
+
     <scm>
         <connection>scm:git:git:https://github.com/onclave/NSGA-II.git</connection>
         <url>https://github.com/onclave/NSGA-II</url>
@@ -68,6 +85,57 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>3.2.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar-no-fork</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.2.0</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </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>
+                    </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>
             <plugin>
                 <groupId>org.owasp</groupId>
                 <artifactId>dependency-check-maven</artifactId>