:hammer: cleanup
:hammer: cleanup

- Replaced codepoint calculation by bit operations.
- Fixed several clang-tidy warnings.

kaidokert/json,hunter-packages/json,theodelrieu/json,nlohmann/json,kaidokert/json,nlohmann/json,hunter-packages/json,theodelrieu/json,hunter-packages/json,kaidokert/json,nlohmann/json