Log Message:
librsvg: updated to 2.58.0

Version 2.58.0

librsvg crate version 2.58.0

The most significant change in this release is that librsvg no longer
uses gdk-pixbuf for loading raster images (for eample, when there is
an element <image href="foo.jpg"/>.  All image loading uses Rust
codecs now.  Please see the release notes for 2.57.90 below for more
details.

Librsvg's gdk-pixbuf loader for SVG documents is unchanged; you can
still load SVG files from gdk-pixbuf with it as usual.

New features since 2.57.0 (for fine-grained bug fixes, please see the
release notes for development releases):

- Add basic support for "ch" length units in CSS (Mackenzie Morgan).

- Support "var(--foo, #aabbcc)" just for colors.  This is the
  minimum required to render color SVG emoji fonts that provide color
  fallbacks, but it is not yet full support for CSS var().

Fixes since the last development release:

- Limit numOctaves in feTurbulence to avoid unbounded CPU consumption.

- Don't panic when a :lang selector has an argument that is
  not a language-range (Lukáš Tyrychtr).

Special thanks for this release cycle:

- Thanks to correctmost for doing several rounds of fuzzing, and then
  found some interesting bugs!

- Thanks to Jordan Petridis for adding CI jobs for testing on
  gnome-os's regular builds.

- As usual, thanks to Chun-wei Fan for keeping the Windows builds
  going, and Bilal Elmoussaoui for updating gtk-rs crates.