Update cairo-rs requirement from 0.7.1 to 0.8.0

Updates the requirements on [cairo-rs](https://github.com/gtk-rs/cairo) to permit the latest version.
- [Release notes](https://github.com/gtk-rs/cairo/releases)
- [Commits](gtk-rs/cairo@0.7.1...0.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Cargo.toml

@@ -35,7 +35,7 @@ default-features = false
 features = ["jpeg", "png_codec", "bmp"]
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.cairo-rs]
-version = "0.7.1"
+version = "0.8.0"
 optional = true
 features = ["ps"]