Update googletest version

What is the new feature

Update googletest version. The old v1.12.1 uses a deprecated CMake minimum version.

How is it implemented

Update the download version in FetchContent

Mandatory steps before review

• Gitlab CI passes (Hint: use make format for linting)
• New feature is covered by additional unit tests
• Mark the merge request as ready by removing Draft:

Mandatory steps before merge

• Reviewed by a maintainer
• Incorporate review suggestions
• Remember to edit the commit message and select the proper changelog category (feature/bugfix/other)
• Prior to merging, please remove any boilerplate from the MR description, retaining only the Please describe your feature in a couple of words and describe important implementation details of the feature section to maintain

You are not supposed to merge this request by yourself, the maintainers of libiconmath take care of this action!

assigned to @b382190

requested review from @k202170

added ready for review label

added 2 commits

• 0c5f7d1d - 1 commit from branch feature-add-cpp-codes
• b1c15e8a - Update googletest version

Compare with previous version

marked the checklist item Gitlab CI passes (Hint: use make format for linting) as completed

marked the checklist item Mark the merge request as ready by removing Draft: as completed

marked the checklist item Reviewed by a maintainer as completed

marked the checklist item Incorporate review suggestions as completed

marked the checklist item Remember to edit the commit message and select the proper changelog category (feature/bugfix/other) as completed

marked the checklist item Prior to merging, please remove any boilerplate from the MR description, retaining only the Please describe your feature in a couple of words and describe important implementation details of the feature section to maintain as completed

merged

mentioned in commit cbc6772b

mentioned in commit af882064

mentioned in commit 1a7b2116

mentioned in commit c880792e