BUG - python-dotenv requirement is explicitly ==0.20

[garrett-symbiosys]

Describe the bug

In the requirements.txt, the dependency on python-dotenv is hard set to 0.20. This is causing dependency issues with many python libraries like pydantic and pydantic-settings.

To Reproduce

Steps to reproduce the behavior:

1. Attempt to install pinterest-python-sdk and pydantic-settings.

Expected behavior

If the python-dotenv dependency was >=0.20 instead of ==0.20, this issue will go away.

Additional Details (please complete the following information):

• OS and Version: [e.g. MacOS, Windows]
• SDK Version 0.2.3

[dfana01]

@garrett-symbiosys

We loosened the version. Please let us know if it works on your end; here are the reference PR

#142