Regression: memoryview() + bytes() fails (__add__)

[dhalbert]

I discovered this on 9.0.0 while using adafruit_ble_eddystone to debug something else. It works in 8.2.x. This is a MicroPython regression between v1.20.0 and v1.21.0. Filed micropython#13733.

>>> memoryview(b'x') + b'y'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported types for __add__: 'memoryview', 'bytes'

[dhalbert]

This is not a bug after all. See micropython#13733