community/libsigc++: upgrade to 2.12.1

community/libsigc++/APKBUILD

 # Contributor: Leo <thinkabit.ukim@gmail.com>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libsigc++
-pkgver=2.12.0
-pkgrel=1
+pkgver=2.12.1
+pkgrel=0
 pkgdesc="type-safe Signal Framework for C++"
 url="https://github.com/libsigcplusplus/libsigcplusplus"
 arch="all"
@@ -28,5 +28,5 @@ package() {
 }
 
 sha512sums="
-88e382e274a574a4b6129e23916054642e1696c663a4bb84f05e14a401f0cb56d0a0bf8c3a6273aec36ce121ce18a338b6d491fb213bcdf5a627bd382719e021  libsigc++-2.12.0.tar.xz
+5e5c920807952c732a9acb139f707fdf556786133c18bc8842130803f864ba1f260e1d4a51be0a9892c2228bcfdf129a9a2ce91e3d20077870431a53a87a9f2a  libsigc++-2.12.1.tar.xz
 "