Update the version to 2.18.3

Author: Marek Suchánek

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "newdoc"
-version = "2.18.2"
+version = "2.18.3"
 description = "Generate pre-populated module files formatted with AsciiDoc that are used in Red Hat and Fedora documentation."
 authors = ["Marek Suchánek <msuchane@redhat.com>"]
 license = "GPL-3.0-or-later"

newdoc.spec

@@ -1,6 +1,6 @@
 Name: newdoc
 Summary: Generate an AsciiDoc file using a modular template
-Version: 2.18.2
+Version: 2.18.3
 Release: 1%{?dist}
 License: GPLv3+
 URL: https://github.com/redhat-documentation/newdoc