Bump org.apache.maven.plugins:maven-javadoc-plugin from 3.6.2 to 3.6.3 (#741)

pom.xml

@@ -292,7 +292,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>3.6.2</version>
+          <version>3.6.3</version>
           <configuration>
             <quiet>true</quiet>
             <doclint>-missing</doclint>