fix: remove unused dependencies (#6)

feat: expose session and headers (#5)

* In some scenarios you may not always want to change the wizard step in your action. E.G if you are appending form data to the session in a single step.

  * Previously it was not possible to access the Set-Cookie header for this use case, so I have exposed the underlying `session` and added a helper function `getHeaders` which will create the `Set-Cookie` heder with the data in the session

chore(publish): add write permissions (#3)