[librsvg] (27 commits) ...Update NEWS

[Federico Mena Quintero <federico src gnome org>]

Summary of changes:

  18bc1cd... WIP: partially port Image to Rust
  91ea6f3... Add drawing_ctx::draw_node_on_surface()
  99f09ed... Make FilterContext::drawing_context() return *mut
  404d5dc... Port (more or less) the rest of feImage
  9f8d34b... Don't render filter if bbox rect is empty
  b42de45... Big filter bounds computation refactor
  e8c32d9... Fix missing linearization in composite arithmetic
  b856dc6... Add notice about attributes into feOffset
  461009d... Add a missing dot
  31960df... Compute the filter effects region only once
  0042034... Use a better name for test-bbox
  90377fa... Change feOffset attributes to be numbers
  affd9d5... Add comments into feMerge
  62de56f... Use correct CSS values in compute_effects_region()
  0a370f5... Use correct CSS values in with_primitive_units()
  1b52484... Rename new tests
  89b3aad... Fix bbox computation in draw_surface()
  b28dc71... Revert composite linearization fix
  f59801c... Remove leftover debug comment
  3627979... Don't render filters if they are in error
  66d4fd4... Refactor parse to parse{,_and_validate}
  2f033a9... Validate units in <filter> attributes
  7a5f661... Validate units in filter primitive attributes
  4871bed... Replace normalize_ignoring_units with get_unitless
  76d5fdf... Ensure width and height are >=0 in filters
  8d1cc37... Merge branch 'YaLTeR/librsvg-filters-to-rust-4'
  7689c4f... Update NEWS