Exclude Bunt dependency from the runtime

[ghost]

Hello.

I'm facing some issue to integrate Knigge.
Bunt is a dependency used for the CLI, however, when you have to do some release upgrades, SASL release_handler crash because there is no top supervisor for the bunt application.
(See other discussion regarding this also: bitwalker/exrm#183)

An idea would be to tag the bunt dependency only in dev or exclude it from the runtime.

[sascha-wolf]

Fixed in version 1.4.1