Couple of things.

First if you specify node-version of 10, does that use the absoute latest version of Node.js v10 (both minor and patch versions)?

Second, does node-version of 10.x use the latest version when taking account patch versions? Or does .x just mean the minor version?

Finally, it'd be great if this action printed the Node.js version it decided to use in the logs of GitHub Actions so developers can determine which Node.js version it decided to use, which would make debugging SO much easier.