Halftone Encoding Algorithm is Broken

[8bitben]

When using 'halftone' algorithm for image encoding, a Python error is present:

⏳ Applying halftone dithering to image...
Traceback (most recent call last):
  File "/Projects/cat_printer_interface/catprinter/print-modified.py", line 80, in <module>
    custom()
  File "/Projects/cat_printer_interface/catprinter/print-modified.py", line 48, in custom
    data = cmds_print_img(bin_img, dark_mode=True)
  File "/Projects/cat_printer_interface/catprinter/catprinter/cmds.py", line 167, in cmds_print_img
    data += cmd_print_row(row)
  File "/Projects/cat_printer_interface/catprinter/catprinter/cmds.py", line 127, in cmd_print_row
    encoded_img = run_length_encode(img_row)
  File "/Projects/cat_printer_interface/catprinter/catprinter/cmds.py", line 101, in run_length_encode
    if val == last_val:
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
✅ Done.

$ python --version Python 3.10.2

[rbaron]

Thanks for filing the issue @8bitben. I took a quick look and #38 should fix it.