implement deserialize to NamedColor, Rgb, Rgba

 - remove prefix test_ from all unittest function names

Fixes #264

Signed-off-by: Andrei Gherghescu <[email protected]>

Author: andrei-ng

Diff for: CHANGELOG.md

@@ -3,7 +3,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.12.0] - 2024-12-31
+## [0.12.0] - 2025-01-02
 ### Changed
 - [[#256](https://github.com/plotly/plotly.rs/pull/256)] Bump Cargo.toml edition to 2021
 - [[#261](https://github.com/plotly/plotly.rs/pull/261)] Updated code of conduct