Fix test with css case

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin-js-browser-project/app/build.gradle.kts

@@ -11,6 +11,9 @@ dependencies {
 kotlin {
     target {
         browser {
+            webpackTask {
+                cssSupport.enabled = true
+            }
         }
         binaries.executable()
     }