New card configuration option: `circle_color`

Fixing mdi icon size in Home Assistant 0.110.0

 * https://community.home-assistant.io/t/new-custom-ui-card-to-show-animated-power-consumption/189630/16
 * https://community.home-assistant.io/t/what-is-the-proper-way-to-change-mdi-icon-size-with-the-release-0-110-0/197861

New card configuration option: `show_line`

Better display on dark themes

hacs.json