Create release v.0.6.0
Features:
- Make use of
std::spaninstead ofgsl::span(this requires at least C++-20). - Get rid of GSL dependency.
- Removed
libClaPP_CXX_FS_LINKER_FLAG. - Removed compatibility to
std::experimental::filesystem. - Get rid of
inlinenamespaces entirely. - Bumped clang-format from 11 to 18.
- Bumped clang-tidy support from 11 to 17.
- Reworked the complete GitLab-CI.
- Added cmake-format to GitLab-CI.
- Removed some code-smell detected by clang-tidy (e.g. remove of
std::endl, remove ofstd::is_same<>::value, ...)