* Cannot push_back std::string to boost json array
`boost::json::array.push_back` expects a `value`
* prefer emplace_back to avoid casting
* Ensure every MINIMAL_LIB option is tested in CI
Also remove Chemdraw support from the compilation. This does not change the final size of the output (not exported anyways) but it reduces the compilation time by 1 min (-10% on my local machine)
* Expose MMPA with other options
* Fix MMPA compilation: Implicitly binding raw pointers is illegal
Applying same pattern as in `get_frags_helper`