Cornichon an extensible Scala DSL for testing

I am trying to implement an extensible dsl for scala for testing an API and right now I am just trying to get the examples to work in my workspace. I am using intelliJ IDEA 2017.3.3 and my scala version is 2.12.4

When i run the test in the sbt shell all of the values that come with the DSL are "not found". For instance Feature, Scenario, When, get.. etc. I copied the library dependencies from the DSLs homepage and it was downloaded successfully. So why are these values not found?

This suite seems relatively new but if someone could just take a look and help me get started that would be so helpful! Right now I am just trying to test the ReadmeExample and the first part of the Superheros Scenario http://agourlay.github.io/cornichon/

thank you so much!