Update to the most recent version of the IBM Watson NLU API

[dkotter]

Description of the Change

We've been running the 2018-03-19 version of the IBM Watson NLU API for a number of years. According to their documentation, the latest version is 2022-08-10.

Ideally we should be running the latest versions of the various APIs we integrate with (where possible) so this PR updates the API version we make requests to. As far as I can tell in my testing, things still work as expected, no breaking changes were found. The actual results returned are different but that is expected with running a newer API version.

How to test the Change

1. Ensure you have IBM Watson setup and configured properly
2. Ensure classification works with all four features
3. If desired, downgrade the API version back to 2018-03-19 and compare results to see what differences there are

Changelog Entry

Changed - Update the IBM Watson NLU API to the 2022-08-10 version.

Credits

Props @dkotter

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[ravinderk]

I agree with @dkotter, I also did not notice any difference. Between results from different IBM Watson API