Color: add HSLA support

[jepsar]

Checklist

• [X] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [X] I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• [X] This issue contains only one feature request/enhancement.

Description

The current color object only supports RGBA. When it comes to generating random colors HSLA is easier to work with (to get colors with a consistent darkness for example).

Additional information

No response

[AB-xdev]

Fixed by https://github.com/xdev-software/chartjs-java-model/commit/3468543b5cf5c1e6d7e22add93a651d8bbc1d8a0

will be released with the next version

[jepsar]

That's quick! Thank you!