allows for renaming channel names saved to the csv file.

[pellet]

I needed to add this code due to using a custom placement of electrodes with my OpenBCI Cyton.
I'd rather name the channels in the original CSV file correctly than during the analysis phase so I can drop the CSV files easily into other programs for analysis.

[pellet]

I've given this a test on my Mac M1 Pro and I recorded data fine with the n170 experiment - didn't get any crashes.
Here is an example of how to use the modification:

# Move the channel positions close to the occipital lobe and not
# overlapping the HUD straps.
ch_names = ['P7', 'Cz', 'Oz', 'POz', 'PO3', 'PO4', 'O1', 'O2']
eeg_device = EEG(device=board_name, ch_names=ch_names)

[pellet]

@JohnGriffiths By default the channels names are pulled from Brainflow for all devices except for BoardIds.GANGLION_BOARD, BoardIds.GANGLION_WIFI_BOARD and BoardIds.FREEEEG32_BOARD with the following:
BoardShim.get_eeg_names(self.brainflow_id)