Replace datetime.utcnow() with datetime.now(datetime.UTC) to prevent deprecation warnings in Python 3.12+

Description

In Python 3.12+, the use of datetime.datetime.utcnow() is deprecated and scheduled for removal in future versions. The recommended approach is to use datetime.datetime.now(datetime.UTC) for timezone-aware UTC timestamps.

In findatapy/market/marketdatarequest.py, the following line currently raises a DeprecationWarning during test runs:

start_date="year", finish_date=datetime.datetime.utcnow()

Suggested Fix

To ensure compatibility with future versions of Python and avoid runtime warnings, please replace:
datetime.datetime.utcnow()
with
datetime.datetime.now(datetime.UTC)

This change is safe and aligns with the latest best practices for timezone-aware datetime handling in Python.

Environment :

Python version: 3.12.3
Library version: 0.1.40
Platform: Linux Ubuntu 24.04

Thanks

Thank you for maintaining this package! I'd be happy to submit a PR if needed.