Runs on py3.11

[er-eis]

1. async makes py3.11 mad:

../../../../../../venv/lib/python3.11/site-packages/Infoplus/__init__.py:19: in <module>
    from Infoplus.api.aisle_api import AisleApi
../../../../../../venv/lib/python3.11/site-packages/Infoplus/api/__init__.py:6: in <module>
    from Infoplus.api.aisle_api import AisleApi
E     File "/Users/ericeisenberg/programming/backend/venv/lib/python3.11/site-packages/Infoplus/api/aisle_api.py", line 129
E       async=params.get('async'),
E       ^^^^^
E   SyntaxError: invalid syntax

we switch it to _async instead

2. removed the unused import:

from Infoplus.models.gs1128_label_dto import GS1128LabelDTO  # noqa: F401,E501

---

after the fixes w/ py3.11:

...
============================== 5 passed in 2.63s ===============================
PASSED [ 20%]PASSED [ 40%]PASSED [ 60%]PASSED [ 80%]PASSED [100%]
Process finished with exit code 0