Updated: upx-4.2.3-1

[ASSI]

UPX has been updated to version 4.2.3, see the release news for changes:

https://upx.github.io/upx-news.txt

UPX is a free, portable, extendable, high-performance executable packer
for several executable formats.

UPX upstream bundles all dependencies as source and links them in
directly during the build starting with this release, so the Cygwin
package no longer depends on zlib0 and ucl.

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