Update CMake minimum requirements to 3.18

As CMake 3.5 support has been removed in cmake-4.x

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea1bae1..6ca63b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5 FATAL_ERROR)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.18 FATAL_ERROR)
 
 # ---[ Setup project
 PROJECT(