feat(ansi): add hsl and rgb values

[sgoudham]

Should have probably done this in the initial release.

I've chosen to still use tinycolor2 but I'm wondering if it's better to use the new colorjs.io dependency here. It would be nice to move away from tinycolor2 to ensure that we're only using one colour library but I suppose it doesn't really hurt anyone if we decide to keep both.

Going forward, we should decide if we want to:

1. Move away from tinycolor2 in favour of colorjs.io for all colour transformations. Unfortunately, moving away from tinycolor2 would mean a slight breaking change in the precision for HSL values so that's something to keep in mind, see example below:

   

OR

2. Keep tinycolor2 and colorjs.io but ensure that colorjs.io is only used for the LCH modifications as that is the only reason I brought it in (tinycolor2 doesn't support LCH modifications - Support for LCH? bgrins/TinyColor#237)

[sgoudham]

At this moment in time, I'm gonna stick with 2. because tinycolor2 does a lot more work in the background to properly convert to RGB whereas colorjs.io gives me back the raw value between 0 an 1 instead of between 0 and 255.

These dependencies don't impact the end user so I think it's more than fine to keep them both.