Add config for attaching Javadoc and Sources JAR

pom.xml

@@ -93,8 +93,9 @@
         <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>
         <maven-surefire-plugin.version>3.2.2</maven-surefire-plugin.version>
         <maven-failsafe-plugin.version>3.2.2</maven-failsafe-plugin.version>
-        <maven-source-plugin.version>3.1.0</maven-source-plugin.version>
+        <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
         <maven-enforcer-plugin.version>3.3.0</maven-enforcer-plugin.version>
+        <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
         <protobuf-maven-plugin.version>0.6.1</protobuf-maven-plugin.version>
         <jacoco.version>0.8.11</jacoco.version>
         <maven-checkstyle-plugin.version>3.3.0</maven-checkstyle-plugin.version>
@@ -266,6 +267,35 @@
                     <artifactId>maven-dependency-plugin</artifactId>
                     <version>${maven-dependency-plugin.version}</version>
                 </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>${maven-source-plugin.version}</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>${maven-javadoc-plugin.version}</version>
+                    <configuration>
+                        <source>${java.version}</source>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>attach-javadocs</id>
+                            <goals>
+                                <goal>jar</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
             </plugins>
         </pluginManagement>
         <plugins>