Node.js 15 release: Updated handling of rejections, npm 7, N-API Version 7, and more

This post details the Node.js 15 release, focusing on the updated default behavior for unhandled promise rejections which now terminate the process instead of issuing warnings. It also highlights the inclusion of npm 7 with default peer dependency installation, N-API Version 7 with `napi_detach_arraybuffer` and `napi_is_detached_arraybuffer` methods, and continued refinement of the experimental Async Local Storage APIs. The post also notes that Node.js 14.x is becoming the LTS version, featuring stable Diagnostic Reports and built-in ICU data.