Test dependency versions are out of date

[emilykl]

Dependency versions for tests (specified in packages/python/plotly/test_requirements/) are years out of date; e.g. most of the files specify pytest==6.2.3 or pytest==7.4.4 which came out in 2021 and 2023 respectively. General dependency upgrade needed to boost all test dependencies to the latest supported versions.

[areeb-h-qureshi]

This fairly simply but how would we test that the updated libraries don't cause the code to break?

[emilykl]

Addressed by #5019 👏