chore: used javac option --release instead of -source and -target (#5)

Author: sttk

pom.xml

@@ -36,8 +36,7 @@
   </scm>
 
   <properties>
-    <maven.compiler.source>21</maven.compiler.source>
-    <maven.compiler.target>21</maven.compiler.target>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <!--
      For changing environment variables in unit tests.