Bump version to 2.1.4

I'm still waiting for feedback on the systemd socket fd versus rule
number issue[1].

However since I'm pretty confident that this is fixed, even if it's not
the case, it surely did fix incrementing the rule position.

That's why I'm releasing with those fixes and if the mentioned issue is
still not fixed, we can still make a 2.1.5 release.

[1]: #27

Signed-off-by: aszlig <aszlig@nix.build>
(cherry picked from commit e9f4da8)

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]
+## [2.1.4] - 2021-07-10
 
 ### Fixed
 - Ordering between systemd socket file descriptor names and rules.

meson.build

@@ -1,6 +1,6 @@
 project('ip2unix', 'cpp',
         default_options: ['cpp_std=c++17', 'warning_level=3'],
-        meson_version: '>=0.46.0', version: '2.1.3')
+        meson_version: '>=0.46.0', version: '2.1.4')
 
 script_findlibc = files('scripts/findlibc.py')
 script_generrno = files('scripts/generrno.py')