Update README.md

Added mention of Unity version
4 年前 · 6c5080a3
--- a/README.md
+++ b/README.md

 If you feel like taking on some **bugs**, check out the [Issues page](https://github.com/UnityTechnologies/open-project-1/issues) on this very repo. In fact, another thing you could help with is by doing some **QA testing**: download the [latest release](https://github.com/UnityTechnologies/open-project-1/releases) of the game, play it, and report issues in the appropriate page. That's also a great way to be part of this project!

+This project is built on **Unity 2019.4 LTS**, whatever latest patch is available.
+
 ## Play the game
 Just want to try the game out? Head to the [release page](https://github.com/UnityTechnologies/open-project-1/releases) and grab the latest version.