Use gem 'toml-rb' instead of 'toml'

[alvaromorales]

Development of the toml gem has not been active in a while, despite bugs (see jm/toml#41).

I've had good experiences with toml-rb. The latest release was on 6/12. Have you considered using it instead?

[jakedavis]

Hey @alvaromorales, sounds like it'd be a good idea to switch to toml-rb. If you'd PR it we'd be very grateful :)

[alvaromorales]

Thanks, just did! Lmk what you think.

[fishnix]

👍 please! :)

[bdangit]

happy to merge the PR if it can be de-conflicted.

[alvaromorales]

Great, see #98