fix example and tutorial compatibility and update metadata

pallets / flask

The Python micro framework for building web applications.

https://flask.palletsprojects.com

BSD 3-Clause "New" or "Revised" License

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Closed davidism closed 4 weeks ago

davidism commented 4 weeks ago

In the tutorial, Python 3.12 now requires registering a converter for the timestamp type, rather than providing a default converter.
The JavaScript example updated to prefer fetch at some point, but the test wasn't updated.
Add a private classifier.

fixes #5556