libsigc++3: update to 3.0.7.

srcpkgs/libsigc++3/template

@@ -1,6 +1,6 @@
 # Template file for 'libsigc++3'
 pkgname=libsigc++3
-version=3.0.3
+version=3.0.7
 revision=1
 wrksrc=libsigc++-${version}
 build_style=meson
@@ -10,8 +10,9 @@ short_desc="Type-safe callback system for C++ programs"
 maintainer="q66 <daniel@octaforge.org>"
 license="LGPL-3.0-only"
 homepage="https://libsigcplusplus.github.io/libsigcplusplus/"
+changelog="https://github.com/libsigcplusplus/libsigcplusplus/blob/master/NEWS"
 distfiles="${GNOME_SITE}/libsigc++/${version%.*}/libsigc++-${version}.tar.xz"
-checksum=e4f4866a894bdbe053e4fb22ccc6bc4b6851fd31a4746fdd20b2cf6e87c6edb6
+checksum=bfbe91c0d094ea6bbc6cbd3909b7d98c6561eea8b6d9c0c25add906a6e83d733
 
 pre_configure() {
 	# build static library as well as shared

srcpkgs/libsigc++3/update

@@ -1 +1,2 @@
+pkgname=libsigc++
 pattern="libsigc\+\+-\K[0-9]\.[0-9]*[02468]\.[0-9.]*[0-9](?=)"