Add plugin for maven source and javadoc (#7)

* Add desc and bump javadoc and sources plugin versions

Signed-off-by: Ivan Pavlovic <pavlovic.ivan.26@gmail.com>

pom.xml

@@ -7,7 +7,7 @@
   <artifactId>java-client</artifactId>
   <version>0.0.1</version>
   <packaging>jar</packaging>
-
+  <description>Java client library for the Armada project</description>
   <name>java-client</name>
   <url>https://github.com/armadaproject/java-client</url>
 
@@ -253,6 +253,32 @@
       </properties>
       <build>
         <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-source-plugin</artifactId>
+            <version>3.3.0</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>3.5.0</version>
+            <executions>
+              <execution>
+                <id>attach-javadocs</id>
+                <goals>
+                  <goal>jar</goal>
+                </goals>
+              </execution>
+            </executions>
+          </plugin>
           <!-- detect os -->
           <plugin>
             <groupId>kr.motd.maven</groupId>