Add cross-compiling support

vendor/THIRD_PARTY_NOTICES.md

@@ -1,27 +1,22 @@
 # Vendor Binaries
 This folder contains pre-compiled binaries from a variety of sources. These should be updated periodically.
 
-### rcedit.exe v2.0.0
-- Updates PE resources, like VersionInfo or icons. It is used when generating `Setup.exe` and `Update.exe` to apply the user preferences.
-- Can be found at https://github.com/electron/rcedit/releases
-- MIT License: https://github.com/electron/rcedit/blob/master/LICENSE
-
 ### signtool.exe v10.0.22621
 - Signs application binaries while building packages.
 - Can be found in the Windows SDK at "C:\Program Files (x86)\Windows Kits\10\bin\10.0.22621.0\x86\signtool.exe" or similar, depending on the version of the SDK you have installed.
 - License? https://github.com/dotnet/docs/issues/10478
 
-### 7za.exe / 7zz v21.07
-- Incldued because it is much faster at zipping / unzipping than the available managed algorithms.
-- Can be found at https://www.7-zip.org/
-- License is LGPL & BSD 3: https://www.7-zip.org/license.txt
-
 ### zstd.exe v1.5.5
 - Fast compression and diff/patch
 - Can be found at https://github.com/facebook/zstd
 - License is GPL-2.0 & BSD 3: https://github.com/facebook/zstd/blob/dev/LICENSE, https://github.com/facebook/zstd/blob/dev/COPYING
 
-### appimagetool
-- Create .AppImage for Linux
+### appimagekit (continuous Mar 8, 2023)
+- Only include the "runtime" binaries needed to create a .AppImage for Linux
 - Can be found at https://github.com/AppImage/AppImageKit
-- License is MIT https://github.com/AppImage/AppImageKit/blob/master/LICENSE
+- License is MIT https://github.com/AppImage/AppImageKit/blob/master/LICENSE
+
+### squashfs-tools-ng v1.3.0
+- Squashfs utilities for Windows
+- Can be found at https://github.com/AgentD/squashfs-tools-ng
+- License is GPL-3 https://github.com/AgentD/squashfs-tools-ng/blob/master/COPYING.md