Merge changes from upstream

SVG Support

Secure Actions

This doesn't affect the theme at all, only affects github actions.

Now deploying the screenshot by generating a pull request on my site's repo.

This release is mostly a test

Dark by Default

It's a dark theme... it should perform as advertised even though it has additional functionality.

It does that now.

Dark/Light switching can be enabled in the config by setting:

DARK_LIGHT_SWITCHING_OFF = False

Action release!

This is probably the final release, but for fun now screenshots are created on release creating using actions.