Build: suppress version and JVM target warnings

To further reduce the output on each build.

libraries/stdlib/jvm-minimal-for-test/build.gradle.kts

@@ -65,6 +65,7 @@ tasks.withType<KotlinCompile> {
         freeCompilerArgs += listOf(
             "-Xallow-kotlin-package",
             "-Xmulti-platform",
+            "-Xsuppress-deprecated-jvm-target-warning",
             "-Xopt-in=kotlin.RequiresOptIn",
             "-Xopt-in=kotlin.contracts.ExperimentalContracts"
         )
@@ -90,4 +91,3 @@ publishing {
         maven("${rootProject.buildDir}/internal/repo")
     }
 }
-