Is your feature request related to a problem? Please describe.
I am on Ubuntu 20.04 and I recently read about direnv adding support for .env. I read the direnv docs (and made some improvements to the docs as well! :) ) and added the required changes to my system, however, I later understood that it's not available for my direnv version 2.21.2.

Describe the solution you'd like
Please add a minimum required version for each key in docs here, especially load_dotenv.

Describe alternatives you've considered
If someone can mention the minimum version required for load_dotenv support, as a reply to this issue, then I will be happy to make the changes to the docs myself.

Additional context
Someone needs work on issue #951to update the direnv packages on Ubuntu. I would help if I could.