libsigc++: Update upstream link

mingw-w64-libsigc++/PKGBUILD

@@ -4,10 +4,10 @@ _realname=libsigc++
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=2.10.6
-pkgrel=1
+pkgrel=2
 pkgdesc="Libsigc++ implements a full callback system for use in widget libraries - V2 (mingw-w64)"
 arch=('any')
-url="https://libsigc.sourceforge.io/"
+url="https://libsigcplusplus.github.io/libsigcplusplus/"
 license=("LGPL")
 makedepends=("${MINGW_PACKAGE_PREFIX}-gcc"
              "${MINGW_PACKAGE_PREFIX}-meson"
@@ -17,27 +17,34 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-gcc"
              "${MINGW_PACKAGE_PREFIX}-pkg-config")
 depends=("${MINGW_PACKAGE_PREFIX}-gcc-libs")
 options=('staticlibs' 'strip')
-source=("https://download.gnome.org/sources/libsigc++/${pkgver%.*}/libsigc++-${pkgver}.tar.xz")
+source=("https://github.com/libsigcplusplus/libsigcplusplus/releases/download/${pkgver}/${_realname}-${pkgver}.tar.xz")
 sha256sums=('dda176dc4681bda9d5a2ac1bc55273bdd381662b7a6d49e918267d13e8774e1b')
 
+prepare() {
+  cd "${srcdir}/${_realname}-${pkgver}"
+
+}
+
 build() {
   [[ -d "${srcdir}/build-${MINGW_CHOST}" ]] && rm -rf "${srcdir}/build-${MINGW_CHOST}"
   mkdir -p "${srcdir}/build-${MINGW_CHOST}" && cd "${srcdir}/build-${MINGW_CHOST}"
 
   MSYS2_ARG_CONV_EXCL="--prefix=" \
-  meson \
+  ${MINGW_PREFIX}/bin/meson.exe \
     --prefix="${MINGW_PREFIX}" \
     --buildtype plain \
+    --wrap-mode=nofallback \
+    -Dauto_features=enabled \
     -Dbuild-documentation=true \
     --default-library both \
-    ../${_realname}-${pkgver}
+    "../${_realname}-${pkgver}"
 
-  ninja
+  ${MINGW_PREFIX}/bin/ninja.exe
 }
 
 package() {
   cd "${srcdir}/build-${MINGW_CHOST}"
-  DESTDIR="${pkgdir}" ninja install
+  DESTDIR="${pkgdir}" ${MINGW_PREFIX}/bin/ninja.exe install
 
   install -Dm644 "${srcdir}/${_realname}-${pkgver}/COPYING" "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/COPYING"
 }