handle CMake deprecation warning

[jmckenna]

• handle the warning thrown as:

  CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.
  
  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.
  

[github-actions]

The backport to branch-1-14 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply 765537a... handle CMake deprecation warning
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config advice.mergeConflict false"

stdout

Auto-merging CMakeLists.txt
CONFLICT (content): Merge conflict in CMakeLists.txt

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-branch-1-14 branch-1-14
# Navigate to the new working tree
cd .worktrees/backport-branch-1-14
# Create a new branch
git switch --create backport-342-to-branch-1-14
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 765537a2999c2fbaee089ab61250dac6863a85e3,b00abf524d418dfe2d63a58908df442ce65f717e,6849692e803f43ed32b95ef5e26e8beb61e48560,3d76212e12647535062efa36df8ce32a2c4a9488,f855a54923e0bc459e1addfc269a05d4f1952951
# Push it to GitHub
git push --set-upstream origin backport-342-to-branch-1-14
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-branch-1-14

Then, create a pull request where the base branch is branch-1-14 and the compare/head branch is backport-342-to-branch-1-14.

[rouault]

1.14 backport in #343