title: python-binance: Get all orders, without specifying symbol
body: <p>Trying to fetch my Binance accounts order history with the <code>python-binance</code> module. There is an option to get all orders within one symbol (<a href="https://python-binance.readthedocs.io/en/latest/account.html#id7" rel="nofollow noreferrer">see documentation</a>):</p>
  <pre><code>orders = client.get_all_orders(symbol='BNBBTC', limit=10)
  </code></pre>
  <p>Bu the problem is I can't pass more than 1coin in the symbol parameter
  How can I pass a list for the symbol parameter, I want to fetch more than 1 coins order history in a single function
  as I'm trying to build a portfolio for my Binance account. Or is there another method to do so?</p>