Bump version to 2.2.1

I'm releasing this earlier rather than later because the missing
serialisation for from-* will really confuse the heck out of anyone
using the feature because it will result in the rule matching *all*
sockets (regardless of whether they're AF_UNIX or even AF_INET).

Signed-off-by: aszlig <aszlig@nix.build>

Author: aszlig

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog], and this project adheres to
 [Semantic Versioning].
 
-## [Unreleased]
+## [2.2.1] - 2023-08-18
 
 ### Fixed
 
@@ -138,7 +138,7 @@ The format is based on [Keep a Changelog], and this project adheres to
 - The initial release, which evolved from an early prototype specific to a
   certain use case into a more generic command line tool.
 
-[Unreleased]: https://github.com/nixcloud/ip2unix/compare/v2.2.0...HEAD
+[2.2.1]: https://github.com/nixcloud/ip2unix/compare/v2.2.0...v2.2.1
 [2.2.0]: https://github.com/nixcloud/ip2unix/compare/v2.1.4...v2.2.0
 [2.1.4]: https://github.com/nixcloud/ip2unix/compare/v2.1.3...v2.1.4
 [2.1.3]: https://github.com/nixcloud/ip2unix/compare/v2.1.2...v2.1.3

meson.build

@@ -1,6 +1,6 @@
 project('ip2unix', 'cpp',
         default_options: ['cpp_std=c++17', 'warning_level=3'],
-        meson_version: '>=0.47.0', version: '2.2.0')
+        meson_version: '>=0.47.0', version: '2.2.1')
 
 script_generrno = files('scripts/generrno.py')
 script_genoffsets = files('scripts/genoffsets.py')