+ re-aligned min maven version to 3.9.0

Author: q3769

pom.xml

@@ -54,7 +54,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.version>3.9.0</maven.version>
-        <maven.compiler.release>8</maven.compiler.release>
+        <maven.compiler.release>11</maven.compiler.release>
     </properties>
 
     <dependencyManagement>