Variable substitution

[mihael-stormrage]

Can you add variable substitution support to this plugin, like it's done in the plugin you based this one on?

Ref: https://github.com/ashald/EnvFile#variable-expansion

There it can be enabled in plugin settings.

[BredoGen]

Hi, Thank you for using this plugin.

I'm planning a new release with full refactoring, I'll try to add variable substitution too.