When `EDITOR` or `VISUAL` are not set, we fallback to the most common
editors. It turns out many users don't have these variables set.
We also check if an editor has been configured with `git`.
Add `deny.toml` with a few exceptions, and update certain dependencies
to get rid of duplicates.
Running `cargo deny check` will yield some warnings still, but no
errors.
cloudhead
Alexis Sellier