Autothemer updated with some QOL additions.

[jasonm23]

Hi I noticed you're using autothemer for your theme hallo-theme.el. I wanted to let you know autothemer has some new quality of life additions for theme developers.

The headline items are:

• Color picking via a completing read / propertized palette list of the autothemer--current-theme (the last eval'ed autothemer-deftheme)

• SVG Palette image generation for themes

For example:

You'll find some more info in the project README.md