I think this was important :^)

build.gradle

@@ -15,7 +15,7 @@ version = "b3"
 group = "de.ellpeck.naturesaura"
 archivesBaseName = "NaturesAura"
 
-if(hasProperty('buildnumber')){
+if (hasProperty('buildnumber')) {
     version = "${version}-${this.properties['buildnumber']}"
 }
 
@@ -73,6 +73,10 @@ processResources {
 
 apply plugin: 'maven-publish'
 
+jar {
+    
+}
+
 task deobfJar(type: Jar) {
     from sourceSets.main.output
     from sourceSets.main.java