chore(gradle): remove xmlpull and document update issues

Author: xeruf

GUIDELINES.md

@@ -2,6 +2,18 @@
 
 This document captures development standards and architecture decisions of this project as a point of reference.
 
+## Gradle
+
+We build everything with gradle, nesting projects if needed.
+Currently we have some pending updates, due to the following incompatibilities:
+
+- The new johnrengelman.shadow plugin version needs Gradle 7
+- The current Dokka version can neither handle Gradle 7 nor Kotlin 1.5.30+ nor Java beyond version 8
+
+The bottleneck is updating dokka,
+which is a longer process tracked in 
+https://github.com/software-challenge/backend/pull/404
+
 ## Testing
 
 Unsere Unittests nutzen das [Kotest-Framework](https://kotest.io) 
@@ -41,7 +53,7 @@ annotate the serialized fields with a concrete type instead.
 Ideally these fields should then be private with generically typed getters 
 as to not expose the implementation details internally.
 
-## Cloning
+## Object Cloning
 
 Relevant discussion: https://github.com/software-challenge/backend/pull/148
 

sdk/build.gradle.kts

@@ -17,7 +17,7 @@ configurations {
 }
 
 artifacts {
-    val kt = tasks["compileTestConfigKotlin"]
+    val kt = tasks.getByName("compileTestConfigKotlin", org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class)
     add("testConfig", kt.outputs.files.first()) {
         builtBy(kt)
     }
@@ -26,13 +26,12 @@ configurations.archives.get().artifacts.removeIf { it.name == "testConfig" }
 
 dependencies {
     api(kotlin("stdlib"))
-    api("com.thoughtworks.xstream", "xstream", "1.4.17") // New security config for 1.4.20
+    api("com.thoughtworks.xstream", "xstream", "1.4.19") // New security config for 1.4.20
     api("jargs", "jargs", "1.0")
     api("org.slf4j", "slf4j-api", "2.0.9")
 
     implementation("org.hamcrest", "hamcrest-core", "2.2")
     implementation("net.sf.kxml", "kxml2", "2.3.0")
-    implementation("xmlpull", "xmlpull", "1.1.3.1")
 
     "testConfigApi"("io.kotest", "kotest-assertions-core")
     "testConfigApi"("io.kotest", "kotest-runner-junit5-jvm", "5.0.3")

sdk/src/test/config/KotestConfig.kt

@@ -5,6 +5,7 @@ import io.kotest.core.spec.IsolationMode
 import io.kotest.core.test.TestCaseOrder
 import kotlin.time.Duration.Companion.seconds
 
+@OptIn(ExperimentalTime::class)
 object KotestConfig: AbstractProjectConfig() {
     override val parallelism = Runtime.getRuntime().availableProcessors()