feat: add support for shadow DOM styling

Close #41

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/carousel/Carousel.java

@@ -25,6 +25,7 @@
 import com.vaadin.flow.component.DomEvent;
 import com.vaadin.flow.component.EventData;
 import com.vaadin.flow.component.HasSize;
+import com.vaadin.flow.component.HasTheme;
 import com.vaadin.flow.component.Tag;
 import com.vaadin.flow.component.dependency.JsModule;
 import com.vaadin.flow.component.dependency.NpmPackage;
@@ -39,7 +40,7 @@
 @Tag("l2t-paper-slider")
 @NpmPackage(value = "@polymer/iron-a11y-keys-behavior", version = "3.0.1")
 @JsModule("./paper-slider/l2t-paper-slider.js")
-public class Carousel extends Component implements HasSize {
+public class Carousel extends Component implements HasSize, HasTheme {
 
   private static final String HIDE_NAV = "hideNav";
   private static final String DISABLE_SWIPE = "disableSwipe";