Small Fixes

-Fixed: Unit Test Generator is now Silenced. Because 4k lines.
-Fixed: Reverted to JavaSetupV1 for build because java14 support.
-Added: Java18 support for build

build.gradle

@@ -79,7 +79,7 @@ task generateTestSource(type: JavaExec) {
 	description = 'Builds the sourcecode for the Tests'
  	classpath = sourceSets.builder.runtimeClasspath
  	main = 'speiger.src.builder.PrimitiveCollectionsBuilder'
- 	args = ['tests']
+ 	args = ['tests', 'silent']
 }
 
 task javadocJar(type: Jar) {