Publishing a package to Deno's official registry

Open source is, at its core, made of people and companies that use free software and have the desire to give back. When you create a piece of code that you think is interesting enough, you most likely want to share it. This is not only a way of helping other people but also a way to improve your own code.

Open source and this culture of sharing is what made Deno, Node.js, and many other technologies you probably use a reality. Since this book is all about Deno, it wouldn't make sense to finish it without going over this topic.

Deno has an official module registry that we've used before. This is a place where anyone with a GitHub account can share their own modules with the community, and it provides automation and caching mechanisms to keep different versions of modules.

What we're going to do next is publish a module of our own to this same registry.

We'll use a piece of software that, until now...