need to install toml gem for travis
need to install toml gem for travis

ChefDK removed toml and uses tomlrb, so we need to install the toml
gem now in order for the lint / spec check to pass in travis. This
works with the cookbook as normal because it's in the metadata as a
gem, but chefspec doesn't run that.

Signed-off-by: Joshua Timberman <d6955d9721560531274cb8f50ff595a9bd39d66f@chef.io>

chef-cookbooks/habitat,chef-cookbooks/habitat,chef-cookbooks/habitat