Update the mingw32uwp wrapper libraries

- windowsapp is the preferred library when targeting Windows 10
https://docs.microsoft.com/en-us/uwp/win32-and-com/win32-apis

- _UCRT ensures we use the Universal C runtime

wrappers/ld-wrapper.sh

@@ -34,7 +34,7 @@ esac
 FLAGS="-m $M"
 case $TARGET_OS in
 mingw32uwp)
-    FLAGS="$FLAGS -lmincore -lvcruntime140_app"
+    FLAGS="$FLAGS -lwindowsapp -lvcruntime140_app"
     ;;
 esac
 ld.lld $FLAGS "$@"