Place an order for a stock.

        https://starfighter.readme.io/docs/place-new-order

def place_new_order(self, stock, price, qty, direction, order_type):
        """Place an order for a stock.

        https://starfighter.readme.io/docs/place-new-order
        """
        url_fragment = 'venues/{venue}/stocks/{stock}/orders'.format(
            venue=self.venue,
            stock=stock,
        )
        data = {
          "stock": stock,
          "price": price,
          "venue": self.venue,
          "account": self.account,
          "qty": qty,
          "direction": direction,
          "orderType": order_type,
        }
        url = urljoin(self.base_url, url_fragment)
        resp = self.session.post(url, json=data)
        return resp.json()