toString() {
    return this.join("");
  }
The `HtmlTagArray Array with a custom `.toString()` method.

This allows the following:
```
  const tags = HtmlTagArray.from([tag1, tag2]);
  const scriptTags = tags.filter((tag) => tag.tagName === 'script');
  const html = scriptTags.toString();
```

Or inside a string literal:
```
  const tags = HtmlTagArray.from([tag1, tag2]);
  const html = `<html><body>${tags.filter((tag) => tag.tagName === 'script')}</body></html>`;
```