fix(core): update

ts_web/elements/dees-input-dropdown.ts

@@ -30,6 +30,11 @@ export class DeesInputDropdown extends LitElement {
     payload: null
   };
 
+  @property({
+    type: Boolean
+  })
+  public required: boolean = false;
+
   public render(): TemplateResult {
     return html`
       ${domtools.elementBasic.styles}