Modify: CI Dependency to libpng 1.6.57

[xsscx]

Maintainer Summary

2026-04-10 21:27:36 UTC

CVE-2026-34757

Task: Modify CI WASM Build & Packaging

libpng 1.6.57 has been released, fixing a medium-severity
use-after-free vulnerability in the chunk setter API, including a
long-standing defect in png_set_hIST present since at least 1.0.9
and regressions in png_set_PLTE and png_set_tRNS introduced in
1.6.56.

References: https://www.openwall.com/lists/oss-security/2026/04/09/2