CI fails during install

[IsabelParedes]

undefined reference to xeus::xinterpreter::internal_request_impl(nlohmann::json_abi_v3_11_3::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::json_abi_v3_11_3::adl_serializer, std::vector<unsigned char, std::allocator<unsigned char> >, void> const&)'
collect2: error: ld returned 1 exit status

This may require pinning nlohmann::json