warning: use of deprecated method

[jurandysoares]

Just to give you a feedback to upgrade a small part of your codebase.

Compiling agg v1.7.0 (/home/boy/.cargo/git/checkouts/agg-7f25bc5356a562d5/489de4d)
warning: use of deprecated method rgb::legacy::internal::rgb::<impl rgb::Rgb<T>>::alpha: use .with_alpha(a) instead; this will become a getter in the future
--> src/renderer/fontdue.rs:172:40
|
172 | ... vec![self.theme.background.alpha(255); self.pixel_width * self.pi...
| ^^^^^
|
= note: #[warn(deprecated)] on by default

warning: use of deprecated method rgb::legacy::internal::rgb::<impl rgb::Rgb<T>>::alpha: use .with_alpha(a) instead; this will become a getter in the future
--> src/renderer/fontdue.rs:194:63
|
194 | ... buf[y * self.pixel_width + x] = c.alpha(255);
| ^^^^^

warning: use of deprecated method rgb::legacy::internal::rgb::<impl rgb::Rgb<T>>::alpha: use .with_alpha(a) instead; this will become a getter in the future
--> src/renderer/fontdue.rs:205:18
|
205 | .alpha(255);
| ^^^^^

warning: agg (lib) generated 3 warnings
Finished release profile [optimized] target(s) in 3m 03s
Installing /home/boy/.cargo/bin/agg
Installed package agg v1.7.0 (https://github.com/asciinema/agg#489de4da) (executable agg)

[ku1ik]

This should be fixed on develop. fontdue renderer is no more but its successor, swash renderer, uses with_alpha now.