v2.2.0

• Add --pdf-page-format option to choose how pdf pages are extracted. Replaces
  to_pixmap in the API.
• --cbz now works on PDF files. Can create original image CBZs with
  --pdf-page_format image for PDFs with single image pages.
• --validate validates imported and archive metadata against available schemas
• --import expands quoted "glob*" paths.
• Fix comicbox jsonschema.
• Many more type annotations. Include py.typed sentinel file.