Unable to configure maven ProGuard plugin - proguard

Question

I'm trying to use proguard plugin for reducing and optimizing my jar. However, I am facing difficulties in using this plugin. Below is my project pom file:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.hps</groupId>
<artifactId>geomesafrontend</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<name>geomesafrontend</name>
<url>http://maven.apache.org</url>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>org.locationtech.geomesa</groupId>
<artifactId>geomesa-accumulo-datastore_2.11</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.accumulo</groupId>
<artifactId>accumulo-core</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<!-- <minimizeJar>true</minimizeJar> -->
<createDependencyReducedPom>false</createDependencyReducedPom>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.github.wvengen</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<version>2.0.14</version>
<dependencies>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard-base</artifactId>
<version>5.3.3</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>package</phase>
<goals><goal>proguard</goal></goals>
</execution>
</executions>
<configuration>
<!-- <proguardVersion>4.10</proguardVersion> -->
<options>
<option>-keep public class com.hps.EventServer{public static void main(java.lang.String[]);}</option>
<option>-keep public class com.hps.AvroCodec{*;}</option>
</options>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>locationtech-releases</id>
<url>https://repo.locationtech.org/content/groups/releases</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>osgeo</id>
<url>http://download.osgeo.org/webdav/geotools</url>
</repository>
</repositories>
</project>
when I run the command: mvn package, I am getting lots of warnings like regarding the duplicate definition of library classes and can't find referenced class java.lang.Class. At the end, the build fails.
I am new to maven, any documentation which will help newbies in understand how to configure it correctly will also be helpful.