Seems to need a build section in top level pom

Hi,

I am no expert on mvn or pom's but seems like the top level pom.xml needs a section indicating which compiler version should be used, my installation (ubuntu 22.04) defaulted to version 5 which do not work.

There is likely a better way to get the version numbers out through variables, but adding this to top level pom.xml made it to build & test:

    <build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.13.0</version> <!-- Ensure the correct version -->
            <configuration>
                <source>17</source> <!-- Or your desired Java version -->
                <target>17</target> <!-- Or your desired Java version -->
            </configuration>
        </plugin>
    </plugins>
</build>

Greetz