feat: upgrade to go-procfile-util version 0.6.0
feat: upgrade to go-procfile-util version 0.6.0

Refs #3428
claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,progrium/dokku,alexquick/dokku,claytonbrown/dokku,claytonbrown/dokku,claytonbrown/dokku,progrium/dokku,jimjag/dokku,jimjag/dokku,progrium/dokku,dokku/dokku,jimjag/dokku,dokku/dokku,dokku/dokku,progrium/dokku,progrium/dokku,claytonbrown/dokku,jimjag/dokku,alexquick/dokku,claytonbrown/dokku,progrium/dokku,alexquick/dokku,dokku/dokku,alexquick/dokku,dokku/dokku,alexquick/dokku,claytonbrown/dokku,jimjag/dokku,dokku/dokku,jimjag/dokku,alexquick/dokku,alexquick/dokku,alexquick/dokku,dokku/dokku,jimjag/dokku,progrium/dokku,jimjag/dokku,dokku/dokku