Update DOMPurify dependency

- Update to DOMPurify `3.2.1`, making `@types/dompurify` unnecessary.
- Unfortunately, this change requires a type assertion for now.

Author: Gigabyte5671

package-lock.json

@@ -32,13 +32,12 @@
 	"homepage": "https://github.com/CSS-Canvas/CSS-to-HTML#readme",
 	"devDependencies": {
 		"@playwright/test": "^1.48.0",
-		"@types/dompurify": "^3.0.5",
 		"@types/node": "^22.7.5",
 		"typescript": "^5.6.3",
 		"vite": "^5.4.9"
 	},
 	"dependencies": {
 		"css-selector-parser": "^2.3.2",
-		"dompurify": "^3.1.6"
+		"dompurify": "^3.2.1"
 	}
 }

package.json

@@ -88,9 +88,7 @@ export function replaceTextNode (element: HTMLElement | Element, value: string):
  * @returns A sanitized copy of the given element.
  */
 export function sanitizeElement (element: HTMLElement): HTMLElement {
-    const sanitizedElement = DOMPurify.sanitize(element, { RETURN_DOM: true });
-    if (sanitizedElement instanceof HTMLBodyElement && !(element instanceof HTMLBodyElement)) {
-        return sanitizedElement.firstElementChild as HTMLElement;
-    }
+    const sanitizedElement = element.cloneNode(true) as HTMLElement;
+    DOMPurify.sanitize(sanitizedElement, { IN_PLACE: true });
     return sanitizedElement;
 }