[Gradle, JS] Add dev dependency to test

#KT-38683 fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -598,6 +598,7 @@ abstract class AbstractKotlin2JsGradlePluginIT(private val irBackend: Boolean) :
             assertFileExists("build/js/node_modules/file-dependency")
             assertFileExists("build/js/node_modules/file-dependency-2")
             assertFileExists("build/js/node_modules/file-dependency-3/index.js")
+            assertFileExists("build/js/node_modules/42/package.json")
         }
     }
 

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/npm-dependencies/build.gradle.kts

@@ -19,6 +19,7 @@ kotlin.sourceSets {
             implementation(npm("file-dependency", projectDir.resolve("file-dependency")))
             implementation(npm(projectDir.resolve("file-dependency-2")))
             implementation(npm(projectDir.resolve("file-dependency-3")))
+            implementation(devNpm("42", "0.0.1"))
             implementation(npm("react", " >= 16.4.0 < 16.9.0"))
         }
     }
@@ -26,7 +27,7 @@ kotlin.sourceSets {
     getByName("test") {
         dependencies {
             implementation(kotlin("test-js"))
-            implementation(npm("mocha"))
+            implementation(npm("mocha", "*"))
         }
     }
 }