FIX to Pydantic 2

[yudytskiy]

I would not recomend to remove each_item=True parameter from validators. Just import Set and replace Sequence with Set:

-from typing import Optional, Union, Sequence, List
+from typing import Optional, Union, Sequence, List, Set
...
-     authjwt_token_location: Optional[Sequence[StrictStr]] = {'headers'}
+     authjwt_token_location: Optional[Set[StrictStr]] = {'headers'}
...
...

[ugolbck]

Hi @IndominusByte could you please consider those changes? Thank you