update to clang / llvm 18

[Totto16]

Fixes (partially) #142

failures are related to error on the macos runner images, that are still not fixed

[github-actions]

Code Coverage Summary

Filename                                  Stmts    Miss  Cover    Missing
--------------------------------------  -------  ------  -------  --------------------------------------
src/game/mino.cpp                            10      10  0.00%    3-20
src/game/mino.hpp                             1       1  0.00%    19
src/game/mino_stack.cpp                      61      61  0.00%    7-91
src/graphics/point.hpp                        3       3  0.00%    16-23
src/helper/color.cpp                         85      35  58.82%   11-31, 38-53, 61, 75, 145-156, 161-164
src/helper/color.hpp                         83      65  21.69%   41, 45, 48, 73-101, 140-221
src/helper/color_literals.hpp               335      33  90.15%   51, 437, 592, 657-705, 719-722
src/helper/date.cpp                          46      46  0.00%    9-113
src/helper/errors.cpp                        16      16  0.00%    3-29
src/helper/errors.hpp                         0       0  100.00%
src/helper/parse_json.cpp                    23      23  0.00%    6-55
src/helper/random.cpp                        13      13  0.00%    4-24
src/helper/sleep.cpp                         15      15  0.00%    20-71
src/helper/utils.hpp                          2       2  0.00%    61-62
src/thirdparty/hash-library/sha256.cpp      417     417  0.00%    40-604
TOTAL                                      1110     740  33.33%

Results for commit: c237aa4

Minimum allowed coverage is 0%

♻️ This comment has been updated with latest results

[Totto16]

The mac failures where to a bug in homebrew, where the library include path for openssl was wrong, see Homebrew/homebrew-core#169728 and Homebrew/homebrew-core#169728

even if this was fixed upstream, openssl is preinstalled on the runner images, so we need to wait for actions/runner-images#9755

which releases the fix on ~ 7. May