Describe the bug
Running mplfinance.plot() in Spyder, if Ipython Console is set with automatic graphic output (Preference->Ipython Console->Graphics->Output: Automatic), Ipython crashes.
Please verify if this bug is related to mplfinance.

To Reproduce

1. Set Spyder preferente to plot graphic output not inline (Preference->Ipython Console->Graphics->Output: Automatic);
2. Run the "Basic Usage" tutorial (https://github.com/matplotlib/mplfinance#usage);
3. See Ipython console crashing.

Expected behavior
Figure generated without Ipython console crashing.

Desktop (please complete the following information):

• mplfinance 0.12.5a2
• Spyder 4.0.1
• Python 3.7.6 64 bits
• Qt 5.9.6
• PyQt5 5.9.2
• Windows 10.0.18362.900

Additional context
Using inline graphics configuration, Ipyhton do not crash.