[PSA] emscripten 5.0

[Sam Clegg]

Hi all,

We just released emscripten 5.0.   Mostly by coincidence it's the first release of the new year just like 4.0 was a year ago!

There are almost 2000 changes in the last year, and you can see the highlights in ChangeLog.md.
Recently highlights include:

  - LLVM libraries updated to 21.0 
  - New `__async: auto` decorator for simplified JSPI/ASYICIFY usage ()
  - New `-sEXECTUABLE` setting to generate executable JS files (#!)
  - Smaller/faster `-sMAIN_MODULE` support (main module is no longer relocatable)
  - Support for blocking `poll()/select()` when using JSPI/ASYNCIFY/threads
  - Better/explicit support for Bun and Deno
  - Smaller `SINGLE_FILE` support via new binary encoding

cheers,
sam