- [x] The main file is `singled_header/json.hpp` and not `src/json.hpp`. - [x] Document amalgamation process (see #700). - [x] Document forward declaration (and annotate issues). - [x] Update contribution guidelines. - [x] Update tests: compile suite with `singled_header/json.hpp` as well as `src/json.hpp`. - [x] Add test: Check that `singled_header/json.hpp` is updated.
singled_header/json.hppand notsrc/json.hpp.singled_header/json.hppas well assrc/json.hpp.singled_header/json.hppis updated.