v0.4.0

Added

• weasysvg-convert, a command line converter from SVG to PDF, PNG or a flat SVG. It accepts the options
  of rsvg-convert that pandoc passes, so a service can install it under that name: pandoc then draws
  <foreignObject>, filters and masks in a PDF and in the PNG fallback of a DOCX. Only data: URLs are
  fetched. The PNG needs the convert extra (PDFium), the flat SVG needs pdftocairo of Poppler.
• weasysvg.portable(): inside it, a mask of opaque white areas, then opaque black ones, is a clip path
  instead of a soft mask. cairo turns a soft mask into an image when it writes SVG, and lost the D2 cuts
  under the edge labels. The flat SVG of weasysvg-convert keeps them vector, and Word draws them.

Full changelog: v0.3.1...v0.4.0