- Features:
- `HSLColor` now implemented as a dataclass using slots for efficiency and performance.
- Color scales concatenation. Now it is possible to concatenate several color scales into a
single one.
- Color scales lerp'ing. Now colors can be created given a color scale and a position in it.
- Color scales conversion:
- To SVG linear gradients as `xml.etree.ElementTree.Element` trees.
- To Plotly color scales.
- Extraction of color sequences from color scales.