6.4.0

Enhancements

• [feature] notice: support user defined box styles #913
• [feature] frontmatter: add expanded parameter for shortcodes #911
• [feature] resources: add expanded parameter #908
• [feature][change] notice: collapse borders if single code block is displayed #906

Fixes

• [bug] include: don't erroneously remove headings if hidefirstheading=true #914

Maintenance

• [task] build: add link for migration into changelog #915
• [task] shortcodes: fix whitespace issues #907