Provide Kotlin 1.8 support

[Akazm]

Even though Kotlin exposes suspend fun as async func to Swift, there's still no ability to cancel tasks. I therefore tried to add koru to our company-internal SDK running on Kotlin 1.8, which unfortunately fails:

Caused by: org.gradle.api.artifacts.UnknownConfigurationException: Configuration with name 'kspCommonMainMetadata' not found. at org.gradle.api.internal.artifacts.configurations.DefaultConfigurationContainer.createNotFoundException(DefaultConfigurationContainer.java:108) at org.gradle.api.internal.DefaultNamedDomainObjectCollection.getByName(DefaultNamedDomainObjectCollection.java:333) at org.gradle.api.internal.artifacts.configurations.DefaultConfigurationContainer.getByName(DefaultConfigurationContainer.java:98) at org.gradle.api.internal.artifacts.configurations.DefaultConfigurationContainer.getByName(DefaultConfigurationContainer.java:50) at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.add(DefaultDependencyHandler.java:125) at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.add(DefaultDependencyHandler.java:119) at org.gradle.kotlin.dsl.support.delegates.DependencyHandlerDelegate.add(DependencyHandlerDelegate.kt:55) at com.futuremind.koru.gradle.CompilerPlugin$enableKspRunForCommonMainSourceSet$1.invoke(CompilerPlugin.kt:33) at com.futuremind.koru.gradle.CompilerPlugin$enableKspRunForCommonMainSourceSet$1.invoke(CompilerPlugin.kt:12) at org.gradle.kotlin.dsl.ProjectExtensionsKt.dependencies(ProjectExtensions.kt:178) at com.futuremind.koru.gradle.CompilerPlugin.enableKspRunForCommonMainSourceSet(CompilerPlugin.kt:31) at com.futuremind.koru.gradle.CompilerPlugin.apply(CompilerPlugin.kt:17) at com.futuremind.koru.gradle.CompilerPlugin.apply(CompilerPlugin.kt:12) at org.gradle.api.internal.plugins.ImperativeOnlyPluginTarget.applyImperative(ImperativeOnlyPluginTarget.java:43) at org.gradle.api.internal.plugins.RuleBasedPluginTarget.applyImperative(RuleBasedPluginTarget.java:51) at org.gradle.api.internal.plugins.DefaultPluginManager.addPlugin(DefaultPluginManager.java:187) at org.gradle.api.internal.plugins.DefaultPluginManager.access$100(DefaultPluginManager.java:52) at org.gradle.api.internal.plugins.DefaultPluginManager$AddPluginBuildOperation.run(DefaultPluginManager.java:282) at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29) at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26) at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66) at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59) at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157) at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59) at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47) at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68) at org.gradle.api.internal.plugins.DefaultPluginManager.lambda$doApply$0(DefaultPluginManager.java:167) at org.gradle.configuration.internal.DefaultUserCodeApplicationContext.apply(DefaultUserCodeApplicationContext.java:44) at org.gradle.api.internal.plugins.DefaultPluginManager.doApply(DefaultPluginManager.java:166) ... 192 more