Update config file parsing for toml-rs 3.0
Update config file parsing for toml-rs 3.0

Signed-off-by: Salim Alam <18ae4dd1e3db1d49a738226169e3b099325c79a0@chef.io>

habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat