A modern programming language that makes developers happier.

kotlinlang

adding this made everything work:
            &lt;exclusions&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.jetbrains.kotlin&lt;/groupId&gt;
                    &lt;artifactId&gt;kotlin-stdlib&lt;/artifactId&gt;
                &lt;/exclusion&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.jetbrains.kotlin&lt;/groupId&gt;
                    &lt;artifactId&gt;kotlin-test-junit&lt;/artifactId&gt;
                &lt;/exclusion&gt;
            &lt;/exclusions&gt;