a little change to make it more easy to use

[Derrity]

then we can use

auto decoded = jwt::decode(token)

and

bool verifile = jwt::verify()

[Derrity]

const bool verify(const decoded_jwt<json_traits>& jwt) const {
            try {
                std::error_code ec;
                verify(jwt, ec);
                error::throw_if_error(ec);
                return true;
            }catch(const std::exception&){
                return false;
            }
        }

[prince-chrismc]

A bool is not capable of transmitting all the various error states.

This would be a welcomed addition if you followed the existing std::error_code mechanism the library implemented