--lineart unicode not working

[sje30]

Hi,

Thanks for a great package.

--lineart unicode when generating calw generates the following error (fancy and ascii work as required).

$ gcalcli  --lineart unicode calw
Traceback (most recent call last):
  File "/sbin/gcalcli", line 33, in <module>
    sys.exit(load_entry_point('gcalcli==4.3.0', 'console_scripts', 'gcalcli')())
  File "/usr/lib/python3.10/site-packages/gcalcli/cli.py", line 167, in main
    gcal.CalQuery(
  File "/usr/lib/python3.10/site-packages/gcalcli/gcal.py", line 1282, in CalQuery
    self._GraphEvents(cmd, start, count, event_list)
  File "/usr/lib/python3.10/site-packages/gcalcli/gcal.py", line 487, in _GraphEvents
    self.printer.msg(week_top + '\n', color_border)
TypeError: can't concat str to bytes

[Aleuck]

Exact same error in two diferent systems (OpenSuse Tumbleweed and Raspberry Pi OS).

[dbarnett]

Fixed via #582.