Support multiple version requirements on single element

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt

@@ -296,6 +296,10 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
         doTestKotlinLibraryWithWrongMetadataVersionJs("library", "-Xskip-metadata-version-check")
     }
 
+    fun testRequireKotlin() {
+        compileKotlin("source.kt", tmpdir, listOf(compileLibrary("library")))
+    }
+
     fun testRequireKotlinInNestedClasses() {
         compileKotlin("source.kt", tmpdir, listOf(compileLibrary("library")))
     }

compiler/tests/org/jetbrains/kotlin/serialization/AbstractVersionRequirementTest.kt

@@ -37,8 +37,8 @@ abstract class AbstractVersionRequirementTest : TestCaseWithTmpdir() {
             val descriptor = module.findUnambiguousDescriptorByFqName(fqName)
 
             val requirement = when (descriptor) {
-                is DeserializedMemberDescriptor -> descriptor.versionRequirement
-                is DeserializedClassDescriptor -> descriptor.versionRequirement
+                is DeserializedMemberDescriptor -> descriptor.versionRequirements.single()
+                is DeserializedClassDescriptor -> descriptor.versionRequirements.single()
                 else -> throw AssertionError("Unknown descriptor: $descriptor")
             } ?: throw AssertionError("No VersionRequirement for $descriptor")