Update javadoc plugin and its configuration

Author: aleksandr-m

pom.xml

@@ -106,6 +106,14 @@
                     <encoding>${project.build.sourceEncoding}</encoding>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.3.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
@@ -158,7 +166,6 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>3.1.0</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>