Merge pull request #30 from nokyan/cairo-rs-0.18

Update cairo-rs to 0.18

Author: AaronErhardt

Cargo.toml

@@ -10,14 +10,14 @@ repository = "https://github.com/plotters-rs/plotters-cairo"
 readme = "README.md"
 
 [dependencies]
-cairo-rs = { version = "0.17", default-features = false }
+cairo-rs = { version = "0.18", default-features = false }
 
 [dependencies.plotters-backend]
 version = "0.3.5"
 
 [dev-dependencies]
-cairo-rs = { version = "0.17", features = ["ps"], default-features = false }
+cairo-rs = { version = "0.18", features = ["ps"], default-features = false }
 
 [dev-dependencies.plotters]
 default_features = false
-version = "0.3.5"
+version = "0.3.5"