6.0.13

## What's Changed
- Support for windows .bat/.ps1 launcher files was completely removed.  These
  days we use a native windows launcher program. (#27359)
- `MEMORY64=2` was marked as deprecated. (#27952)
- The undocumented `FS.filesystems` object was removed. Replace things like
  `FS.filesystems['MEMFS']` with plain `MEMFS`. (#27940)
- libpng port updated from 1.6.58 to 1.6.59. (#27956)


## Contributors
Thanks to the following contributors: @sbc100 (30) @kleisauke (3) @guybedford (2) @juj (2) @dasa (1) @dimokol (1) @hoodmane (1) @kripken (1)

**Full Changelog**: https://github.com/emscripten-core/emscripten/compare/6.0.12...6.0.13