Update librsvg to version 2.59.1

[danyeaw]

librsvg updated the build system to meson. This is a draft PR until we resolve issues related to building librsvg with the latest Cargo.

[pbor]

It is not clear to me if it is the same issue or an additional one, but there is also a compatibility issue with meson 1.5 https://gitlab.gnome.org/GNOME/librsvg/-/issues/1099

[danyeaw]

Upstream Rust issue: rust-lang/rust#129020

[pbor]

If that is accurate, the fix should be in Rust 1.82.0, which is scheduled on Oct 17

[fanc999-1]

It is not clear to me if it is the same issue or an additional one, but there is also a compatibility issue with meson 1.5 https://gitlab.gnome.org/GNOME/librsvg/-/issues/1099

No, it's an additional one that actually hits HarfBuzz, not librsvg. I checked with 1.5.1, and things worked there.

[pbor]

It is not clear to me if it is the same issue or an additional one, but there is also a compatibility issue with meson 1.5 https://gitlab.gnome.org/GNOME/librsvg/-/issues/1099

No, it's an additional one that actually hits HarfBuzz, not librsvg. I checked with 1.5.1, and things worked there.

Ok, but if I read it correctly that only affects meson subprojects so it should not affect us