Another thing I bumped into while switching to `ko...

# kotest

[Attila Domokos]

Another thing I bumped into while switching to kotest is using shouldThrow in our tests. We are getting an error with the message: Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option.
I got around to it by specifying the highest jvm version we could go with in `build.gradle.kts`:

tasks.withType<KotlinCompile> {
    kotlinOptions.jvmTarget = "12"
}

However, I did not have to specify this in kotlintest and I wish we could keep it that way.
What is the root cause of seeing this error? How kotest changed that triggered it? - This is for my own educational purpose.
Also (this might be a #gradle question), is it possible to specify this constraint for tests only in gradle?

[Attila Domokos]

This seems to be working, I wonder if this is correct:

tasks {
     withType<Test> {
         withType<KotlinCompile> {
             kotlinOptions.jvmTarget = "12"
         }
     }
}