Upgrade Jedi to version 0.13.3.

[ericsnowcurrently]

(for #6013)

Note that the update to the change log is a one-off for the sake of whoever does the July release. They will adjust as needed. :)

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• Has a news entry file (remember to thank yourself!)
• [ ] Appropriate comments and documentation strings in the code
• [ ] Has sufficient logging.
• [ ] Has telemetry for enhancements.
• [ ] Unit tests & system/integration tests are added/updated
• [ ] Test plan is updated as appropriate
• [ ] package-lock.json has been regenerated by running npm install (if dependencies have changed)
• [ ] The wiki is updated with any design decisions/details.

[DonJayamanne]

I believe the following line of code needs to be removed self.environment = jedi.api.environment.Environment(sys.prefix, sys.executable) in https://github.com/microsoft/vscode-python/blob/46fbac3d5f5b661d6d740de0c67b8fa35bec4d55/pythonFiles/completion.py