iTango does not work after pybind11 merged

As @tjuerges found today:

after PyBind11 merged iTango does not start:

  File "/home/matveyev/miniforge3/envs/tango10_11/lib/python3.10/site-packages/itango/itango.py", line 1298, in load_ipython_extension
    init_ipython(ip=ipython, store=False, colors=False)
  File "/home/matveyev/miniforge3/envs/tango10_11/lib/python3.10/site-packages/itango/itango.py", line 1210, in init_ipython
    init_db()
  File "/home/matveyev/miniforge3/envs/tango10_11/lib/python3.10/site-packages/itango/itango.py", line 831, in init_db
    db._db_cache = db_cache
AttributeError: 'tango._tango.Database' object has no attribute '_db_cache'