Dial will need updated for new vectorio

[FoamyGuy]

ref: #5087

The vectorio API will be getting changed with regards to it's usage of palette. The Dial wiget that is currently in this library (although slated to move to it's own in circuitpython org) will need updated to reflect those changes in order to work properly.

Adafruit_CircuitPython_DisplayIO_Layout/adafruit_displayio_layout/widgets/dial.py

Line 30 in cb263f1

import vectorio