Issue when running game.py example (Python 3.9.2)

[zimchaa]

Steps: run game.py from the examples directory -

~/Pimoroni/displayotron/examples/dothat/advanced $ ./game.py 

This advanced example uses the menu framework.
It loads the debris game plugin. Your score is
time survived in seconds, see how well you can do!

Press CTRL+C to exit.

[(14, 3), (10, 3), (6, 2), (11, 3), (14, 0), (12, 3), (9, 2), (8, 0), (11, 5), (8, 1)]
Traceback (most recent call last):
  File "/home/zimchaa/Pimoroni/displayotron/examples/dothat/advanced/./game.py", line 40, in <module>
    menu.run()
  File "/usr/local/lib/python3.9/dist-packages/dot3k/menu.py", line 129, in run
    self._thread.start()
  File "/usr/local/lib/python3.9/dist-packages/dot3k/menu.py", line 42, in start
    if not self.isAlive():
AttributeError: 'AsyncWorker' object has no attribute 'isAlive'
Config saved to dot3k.cfg

Seems to be related to, but not solved by the checking of the installation of Cap1xxx

$ python3 -m pip freeze | grep Cap1xxx
Cap1xxx==0.1.4

#66 - created a pull request (apologies if I've not done this correctly) that resolves this issue by editing menu.py to use is_alive instead of isAlive.