v0.20.0 released with JSX support, Top-Level-Await typescript support, window.onunload, and many other features, bug fixes, and performance enhancements.
The deno repo has successfully moved to Github Actions! On every push, we build all the code in V8 and Deno on Mac, Linux, and Windows in about 10 minutes! GHA's 20 concurrent builds quota is a dramatic improvement over our previous Travis/Appveyor CI setup.