merge method

Implementation

ZefyrThemeData merge(ZefyrThemeData other) {
  return copyWith(
    bold: other.bold,
    italic: other.italic,
    underline: other.underline,
    strikethrough: other.strikethrough,
    link: other.link,
    paragraph: other.paragraph,
    heading1: other.heading1,
    heading2: other.heading2,
    heading3: other.heading3,
    lists: other.lists,
    quote: other.quote,
    code: other.code,
  );
}