CMake warning on cmake_minimum_required

[Jaeyoung-Lim]

Minor cmake warning while following the readme

$ cmake .. -DCMAKE_BUILD_TYPE=Release
-- The C compiler identification is GNU 11.4.0
-- The CXX compiler identification is GNU 11.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Build type: Release
C++ Compiler: /usr/bin/c++
-- Found Git: /usr/bin/git (found version "2.34.1") 
Commit hash: 41909d59d4648bf8f58de4145dcc4619f69a5c9b
CMake Warning (dev) in CMakeLists.txt:
  No cmake_minimum_required command is present.  A line of code such as

    cmake_minimum_required(VERSION 3.22)

  should be added at the top of the file.  The version specified may be lower
  if you wish to support older CMake versions for this project.  For more
  information run "cmake --help-policy CMP0000".
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Configuring done
-- Generating done
-- Build files have been written to: /home/jaeyoung/dev/example/build