Describe the bug

When defining a default value of 0 in a swagger doc, it is not rendered in the generated documentation.

Expected behavior

It should be displayed.

Current behavior

It's not

Possible solution

This is probably because of this line :

if (!!0) is false.

I am willing to help, so I will probably throw a quick PR for this if it's OK for you.

Screenshots

Your Environment

• Version used: 2.0.4
• Environment name and version (e.g. Chrome 59, node.js 5.4, python 3.7.3): Firefox 122.0.1
• Operating System and version (desktop or mobile): Desktop

Thanks for the project 🙏