Minor Deprecation issue: "Use Plugin.opts instead of Plugin.config" - PR (#25) submitted

[skttlock]

Hello! Love the plugin, thanks for sharing it with the world.
I am running NeoVim with the Lazy plugin manager, on :checkhealth: I receive the following Error/Warning, as stated in the title:

- ERROR Issues were reported when loading your specs:                                                                         
- WARNING {auto-dark-mode.nvim}: setting a table to Plugin.config is deprecated. Please use Plugin.opts instead

My knowledge and ability to contribute is still prepubescent- my understanding is that this comes from the Readme.md suggested use with Lazy plug. I've submitted a Pull Request, #25 . Let me know if there's anything wrong or anything else I can do.

Thanks!

[nekowinston]

Thanks for the PR!