Suppress urllib3 pyopenssl deprecation warning

[uranusjr]

urllib3 is now deprecating pyopenssl and emits a warning whenever the module is accessed. Since this pacakge’s access of the module is already optional, and falls back gracefully when the module does not exist, the warning can simply be suppressed.

See: urllib3/urllib3#2680

---

This checklist is used to make sure that common guidelines for a pull request are followed.

Description of the change

General Guidelines

• The PR has modified HISTORY.rst with an appropriate description of the change and a version increment.
• The PR has supporting test coverage that confirm the expected behavior and protects against regressions, including necessary recordings.
• Links to associated bugs, if any, are in the description.