Update version number for 5.21.4

GIT_SILENT

Update version number for 5.21.4
GIT_SILENT
f8388107 · Jonathan Esk-Riddell · 63b099df · f8388107
Commit f8388107 authored Apr 06, 2021 by Jonathan Esk-Riddell 🏄
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
 cmake_minimum_required(VERSION 3.0)
 project(breeze)
-set(PROJECT_VERSION "5.21.3")
+set(PROJECT_VERSION "5.21.4")
 set(PROJECT_VERSION_MAJOR 5)

 set(KF5_MIN_VERSION "5.78")