Always send binary data for bind messages

[wilzbach]

                        case BOOLEAN:
                        case TIMESTAMP:
                        case INET:
                        case NUMERIC:
                        case JSONB:
                        case INTERVAL:
                        case VARCHAR:
                        case TEXT:
                            stream.write(cast(short) 0); // text format
                            break;
                        default:
                            stream.write(cast(short) 1); // binary format
                    }