Add back HTMLElementTagNameMap defs

src/index.ts

@@ -6,6 +6,9 @@ declare global {
   interface Window {
     ClipboardCopyElement: typeof ClipboardCopyElement
   }
+  interface HTMLElementTagNameMap {
+    'clipboard-copy': ClipboardCopyElement
+  }
 }
 
 if (!window.customElements.get('clipboard-copy')) {