CI misses errors on event handlers

[amirgon]

When an error occurs on an event handler, the exception in caught and ignored by the scheduler:
For example:

Traceback (most recent call last):
  File "lv_utils.py", line 117, in task_handler
  File "<string>", line 88, in event_cb
  File "<string>", line 124, in draw
AttributeError: 'module' object has no attribute 'draw_polygon'

To fix this, consider catching exceptions on the event loop task_handler and exit with sys.exit(1) if its available.

lv_binding_micropython/lib/lv_utils.py

Lines 116 to 119 in 620a3de

	def task_handler(self, _):
	lv.task_handler()
	if self.refresh_cb: self.refresh_cb()
	self.scheduled -= 1