urllib3 v2.0 compatibility

[basepi]

urllib3 v2.0 came out during PyConUS 2023 and is resulting in hanging tests on windows, and test failures on Linux. We need to update our code/tests to ensure compatibility for this new version.

[pquentin]

Hello fellow Elasticians 👋

We just released urllib3 2.0.1 that includes urllib3/urllib3#2992. We have extensive tests for cert pinning, but Tornado (our test server) can accept multiple connections at a time unlike pytest-localserver. So we did not see the resource leak that caused the deadlock in your case, sorry about that.

Would you mind giving 2.0.1 a try?

[basepi]

@pquentin worked wonderfully. Thanks!