adding an author

In this example we refer to the folder name via {{cookiecutter.project}}.

Here's the contents of the cookiecutter.json file;

{
  "project": "project",
  "author": "author"
}

As well as the contents of the readme.md file;

# readme of {{cookiecutter.project}}

This package was made by {{cookiecutter.author}}.

Both of these files together will be picked up and rendered.