fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMBEUST-174815

pom.xml

@@ -59,9 +59,9 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<maven.compiler.source>1.6</maven.compiler.source>
 		<maven.compiler.target>1.6</maven.compiler.target>
-		<github.tag></github.tag>
-		<github.releaseName></github.releaseName>
-		<github.description></github.description>
+		<github.tag/>
+		<github.releaseName/>
+		<github.description/>
 	</properties>
 
 	<dependencyManagement>
@@ -108,7 +108,7 @@
 			<dependency>
 				<groupId>com.beust</groupId>
 				<artifactId>jcommander</artifactId>
-				<version>1.64</version>
+				<version>1.75</version>
 			</dependency>
 
 			<!--Test-->