Open Window → General → Test Runner.
Update the version number under Assets/Colyseus/package.json and push to master branch.
Markdown files can be converted into PDF any number of ways, most recently used was Markdown to PDF. The goal for this is specifically to appease the Unity team's approval process. The documentation was a lightly edited version of our Getting Started - Unity3D documentation, with hyperlinks fixed and an additional "go to the docs page" link added to the top of the file. Both the PDF and the MD files should be placed under Assets/Colyseus/Documentation~/
MIT