Add support for Drupal 8 and beyond

Problem/Motivation

Add support for newer versions of Drupal

Steps to reproduce

Try to activate in Drupal 9 or later.

Proposed resolution

Replace 'current_content.info' with 'current_content.info.yml'

gist available at https://gist.github.com/josephdickson/17b52a28eac3d6317a893c6ba3f216db