Ignore 'TYPE_CHECKING' imports if string annotation is used

[Zer0x00]

The latest release did include a feature to skip type checking blocks. (Thanks for it!)

Currently it works only if it finds the TYPE_CHECKING block in combination with from __future__ import annotations.
But as far as my understanding goes it is also perfectly fine to not have the annotations module imported but annotate them as a string like this:

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from aws_lambda_powertools.utilities.data_classes import SQSEvent

def handle_sqs_event(event: 'SQSEvent', _context)
   ...

deptry currently doesn't respect those cases.

[mkniewallner]

Thanks for the report. Indeed, this is an oversight from me. This should be fixed with #662.