Outline Helper for Blender 2.8/2.9/3.0+

The Outline Helper Addon for Blender 2.8 helps you to quickly set up inverted hulls for multiple objects simultaneously! You can find its feature set right here: 

UPDATE:

V1.1 is now live! The new version generates a Cycles supported material now, adds vertex groups to all new outlined objects and can edit vertex weights in Edit Mode through the Adjust Outline button.