New package: timeshift-18.4

Closes https://github.com/voidlinux/void-packages/issues/14846

srcpkgs/timeshift/patches/fix-ftbfs-vala40.patch

@@ -0,0 +1,11 @@
+--- src/Utility/Gtk/TerminalWindow.vala.orig
++++ src/Utility/Gtk/TerminalWindow.vala
+@@ -166,7 +166,7 @@
+ 	}
+ 
+ 	public void execute_command(string command){
+-		term.feed_child("%s\n".printf(command), -1);
++		term.feed_child("%s\n".printf(command).to_utf8());
+ 	}
+ 
+ 	public void execute_script(string script_path, bool wait = false){

srcpkgs/timeshift/template

@@ -0,0 +1,19 @@
+# Template file for 'timeshift'
+pkgname=timeshift
+version=18.4
+revision=1
+build_style=gnu-makefile
+hostmakedepends="pkg-config vala"
+makedepends="libgee08-devel json-glib-devel gtk+3-devel vte3-devel libgirepository-devel"
+depends="rsync"
+conf_files="/etc/default/timeshift.json"
+short_desc="System restore tool"
+maintainer="Andrew Benson <abenson+void@gmail.com>"
+license="GPL-3.0-or-later"
+homepage="http://www.teejeetech.in/p/timeshift.html"
+distfiles="https://github.com/teejee2008/timeshift/archive/v${version}.tar.gz"
+checksum=5f180ba2ed66531b10e6cc9b1966e60be1c646ebe304dd0a29b4215318892feb
+
+post_install() {
+	rm "${DESTDIR}/usr/bin/timeshift-uninstall"
+}