Add CompilerConfiguration to JsConfig

Will be used to store common compiler options (such as source version, inline
disabled, etc) as well as JS-specific options, to unify the logic of compiler
option initialization between JS and JVM compilers

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicTest.java

@@ -342,7 +342,7 @@ public abstract class BasicTest extends KotlinTestWithEnvironment {
             librariesWithStdlib.addAll(libraries);
         }
 
-        return new LibrarySourcesConfig.Builder(project, moduleId, librariesWithStdlib)
+        return new LibrarySourcesConfig.Builder(project, getEnvironment().getConfiguration(), moduleId, librariesWithStdlib)
                 .ecmaVersion(ecmaVersion)
                 .sourceMap(shouldGenerateSourceMap())
                 .inlineEnabled(isInlineEnabled)