Update libpng to v1.6.42

Author: donny-dont

README.md

@@ -61,7 +61,7 @@ the requirements.
 | [libxslt](http://xmlsoft.org/libxslt) | 1.1.39 | 2023-11-16 |
 | [lcms](https://www.littlecms.com/) | 2.16.0 | 2023-12-03 |
 | [highway](https://github.com/google/highway) | 1.0.7 | 2023-08-30 |
-| [libpng](http://www.libpng.org/pub/png/libpng.html) | 1.6.41 | 2024-01-24 |
+| [libpng](http://www.libpng.org/pub/png/libpng.html) | 1.6.42 | 2024-01-29 |
 | [libjpeg-turbo](http://libjpeg-turbo.virtualgl.org) | 3.0.2 | 2024-01-24 |
 | [libwebp](https://github.com/webmproject/libwebp) | 1.3.2 | 2023-09-13 |
 | [libjxl](https://github.com/libjxl/libjxl) | 0.9.1 | 2024-01-11 |

ports/libpng/patches/0001-Skip-install-symlink.patch

@@ -1,4 +1,4 @@
-From dcd98afa914f513d517ff1ff05f4b95f43ed3b73 Mon Sep 17 00:00:00 2001
+From 581f4561206f1f390aefcf8a809b70a176546b80 Mon Sep 17 00:00:00 2001
 From: Don <don.j.olmstead@gmail.com>
 Date: Thu, 3 Jan 2019 16:53:04 -0800
 Subject: [PATCH 1/3] Skip install symlink

ports/libpng/patches/0002-Do-not-append-static-to-library-name.patch

@@ -1,4 +1,4 @@
-From c62b89da985f1464be464b2b9070a0060c94fb69 Mon Sep 17 00:00:00 2001
+From ffb6a58cc25d93645f4e91caf61c9e4cebcb87f2 Mon Sep 17 00:00:00 2001
 From: Don <don.j.olmstead@gmail.com>
 Date: Thu, 3 Jan 2019 16:54:07 -0800
 Subject: [PATCH 2/3] Do not append static to library name

ports/libpng/patches/0003-Fix-pkgconfig-on-Windows.patch

@@ -1,4 +1,4 @@
-From 38b80781cc5a77bbdf879d59b481f54ffb18f4c8 Mon Sep 17 00:00:00 2001
+From c08bfe63f60ee50185ce2081789e723e71944756 Mon Sep 17 00:00:00 2001
 From: Don <don.j.olmstead@gmail.com>
 Date: Tue, 30 Nov 2021 10:04:36 -0800
 Subject: [PATCH 3/3] Fix pkgconfig on Windows

ports/libpng/portfile.cmake

@@ -1,10 +1,10 @@
-set(VERSION 1.6.41)
+set(VERSION 1.6.42)
 
 # Get archive
 vcpkg_download_distfile(ARCHIVE
     URLS "https://downloads.sourceforge.net/project/libpng/libpng16/${VERSION}/libpng-${VERSION}.tar.xz"
     FILENAME "libpng-${VERSION}.tar.xz"
-    SHA512 046d0328255572ee2ccab7e751ed457b07e0aedc72474c2f4675a8303e628de3ef8afa1a00c60d768eb788546d1cda1e8b800b2497d9c352694faba6dde2c5b4
+    SHA512 a9e8641f79ebc811e8e1e94c4966737f8d0f3aef33c86834c419ca76050567891c065899c3bc0c945c59b5d50c5ff7d693cc51089d06efe92e71ae8014fa157c
 )
 
 # Patches

ports/libpng/vcpkg.json

@@ -1,6 +1,6 @@
 {
   "name": "libpng",
-  "version": "1.6.41",
+  "version": "1.6.42",
   "description": "libpng is a library implementing an interface for reading and writing PNG (Portable Network Graphics) format files.",
   "homepage": "ttp://www.libpng.org/pub/png/libpng.html",
   "license": "libpng-2.0",