Maven now defaults to an invalid java version

[udalrich]

Trying to build this now fails in m2 (at least with Java 10), because Maven defaults to Java 1.5 and Java 10 will only go back to Java 1.6.

Adding this to m2/pom.xml fixes it.

   <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>10</source>
                    <target>10</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

I found this trying to resolve the same issue as you, so updating it would be worthwhile to help future googlers