MikroTik 0.92.0b1 not loading (AttributeError)

[tjorim]

Home Assistant release with the issue:
0.92.0b1

Last working Home Assistant release (if known):
0.91.4

Operating environment (Hass.io/Docker/Windows/etc.):
Hass.io on generic Linux

Component/platform:
https://rc.home-assistant.io/components/mikrotik/

Description of problem:
MikroTik device tracker does not load: 'MikrotikScanner' object has no attribute 'encoding'. It should not be needed because of the default value. Related to #22715.

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

device_tracker:
  - platform: mikrotik
    host: !secret mikrotik_host
    username: !secret routeros_username
    password: !secret routeros_password

Traceback (if applicable):

Error setting up platform mikrotik

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/homeassistant/components/device_tracker/__init__.py", line 170, in async_setup_platform
    platform.get_scanner, hass, {DOMAIN: p_config})
  File "/usr/local/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.7/site-packages/homeassistant/components/mikrotik/device_tracker.py", line 35, in get_scanner
    scanner = MikrotikScanner(config[DOMAIN])
  File "/usr/local/lib/python3.7/site-packages/homeassistant/components/mikrotik/device_tracker.py", line 63, in __init__
    self.success_init = self.connect_to_device()
  File "/usr/local/lib/python3.7/site-packages/homeassistant/components/mikrotik/device_tracker.py", line 78, in connect_to_device
    'encoding': self.encoding
AttributeError: 'MikrotikScanner' object has no attribute 'encoding'

Additional information:
I tried to add encoding: utf-8 to my config as well.
The new option for mikrotik is missing from the docs anyway.