Fix build warnings

pom.xml

@@ -63,8 +63,7 @@
                 <artifactId>maven-deploy-plugin</artifactId>
                 <version>3.0.0-M1</version>
                 <configuration>
-                    <altDeploymentRepository>internal.repo::default::file://${project.build.directory}/mvn-repo
-                    </altDeploymentRepository>
+                    <altDeploymentRepository>internal.repo::default::file://${project.build.directory}/mvn-repo</altDeploymentRepository>
                 </configuration>
             </plugin>
 
@@ -82,6 +81,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.3.1</version>
                 <configuration>
                     <runOrder>alphabetical</runOrder>
                 </configuration>
@@ -90,9 +90,6 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
                 <version>3.2.1</version>
-                <configuration>
-                    <encoding>UTF-8</encoding>
-                </configuration>
                 <executions>
                     <execution>
                         <id>attach-javadoc</id>
@@ -118,7 +115,6 @@
         <github.global.server>github</github.global.server>
         <additionalparam>-Xdoclint:none</additionalparam>
         <!-- Skip error check for javadoc -->
-        <maven.compiler.compilerVersion>11</maven.compiler.compilerVersion>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
         <maven.deploy.skip>true</maven.deploy.skip><!-- prevent this to be deployed to maven central as "core",