Update rustls version

• rustls bumped to 0.22.4 (CVE-2024-32650) (lockfile)

Fix `cross-rs` builds. Cache dir is now "/tmp" on *nix

• #39 Fix cross-rs builds not working. Cache dir is now /tmp on *nix platforms (thanks @rgwood!)
• Bump deps:
  • proc-macro2 to 1.0.69
  • quote to 1.0.35
  • syn to 2.0.58
  • ureq to 2.9.6
  • url to 2.5.0
  • blake3 to 1.5.1

Bump blake3 to 1.5.0 and ureq to 2.8.0

With the latest ureq changes, it no longer locks down multiple versions of rustls-webpki. This should improve compile times slightly.

• Bumped blake3 to 1.5.0
• Bumped ureq to 2.8.0

Fix offline mode not compiling, bump dependencies

• Fix offline mode not compiling
• Bump proc-macro2 to 1.0.67

Bump dependencies

• Bump quote to 1.0.33
• Bump syn to 2.0.32
• Bump url to 2.4.1

Bump dependencies, documentation improvements

• Bump versions for quote, sun, and proc-macro2
• Improve documentation for svg!, providing a convenient link to Iconify Icon Sets.

Fix documentation for `svg!` macro.

• Fixed svg! attribute example being wrong.

Replace `reqwest` with `ureq`, fix docs, small refactor

• Removed reqwest as a dependency, using ureq instead since we don't use async.
• Fixed flip attribute documentation
• Added a "both" option to flip.
• Added tests, and CI.