I recently posted a research question to the github project. We had to change CDN references from unpgk.com to js.arcgis.com because the former no longer responds reliably and appears to have security vulnerability issues, as far as our security goes. During the change, we found that js.arcgis.com performs very well compared to unpkg.com, but the latest version (1.0.7) doesn't exist at js.arcgis.com. Seems strange to me that the latest build wouldn't be here? Additionally, why is the Esri Calcite API documentation so far behind?
Research question on github
https://github.com/Esri/calcite-components/issues/6492