Replace deprecated property for destination directory of KotlinCompile task (#274)

Author: mannodermaus

plugin/CHANGELOG.md

@@ -3,6 +3,7 @@ Change Log
 
 ## Unreleased
 - Support Gradle configuration cache (#265)
+- Replace usage of deprecated `destinationDir` compiler task property to support Kotlin 1.7.0 and beyond (#274) 
 
 ## 1.8.2.0 (2021-12-19)
 - JUnit 5.8.2

plugin/android-junit5/src/main/kotlin/de/mannodermaus/gradle/plugins/junit5/internal/providers/KotlinDirectoryProvider.kt

@@ -39,7 +39,7 @@ internal class KotlinDirectoryProvider(
         val kotlinTask = project.tasks.findByName(variant.kotlinTaskName)
         return if (kotlinTask != null) {
             // Read folder directly from the Kotlin task
-            setOf((kotlinTask as KotlinCompile).destinationDir)
+            setOfNotNull((kotlinTask as KotlinCompile).destinationDirectory.asFile.orNull)
         } else {
             // If the Kotlin plugin is applied _after_ JUnit 5 in the build file,
             // fall back to the expected path… However, make sure to log a warning to users!