Fix gradle

build.gradle

@@ -22,12 +22,16 @@ import org.apache.tools.ant.taskdefs.condition.Os
 
 plugins {
     id 'java'
-    id 'base'
+    id 'application'
+
+    id 'com.github.johnrengelman.shadow' version '5.0.0'
 }
 
 group 'de.steamwar'
 version ''
 
+mainClassName = ''
+
 Properties steamwarProperties = new Properties()
 if (file("steamwar.properties").exists()) {
     steamwarProperties.load(file("steamwar.properties").newDataInputStream())