Update to JupyterHub 1.4

[kinow]

This is a small change with no associated Issue.

Was having a look at the code and comparing with a checked out jupyterhub when I realized the latest tag (1.4.0) didn't match the version installed with pip.

Looks like they released it some time ago and we didn't update it.

JupyterHub 1.4 is a small release, with several enhancements, bug fixes, and new configuration options.

There are no database schema changes requiring migration from 1.3 to 1.4.

1.4 is also the first version to start publishing docker images for arm64.

In particular, OAuth tokens stored in user cookies, used for accessing single-user servers and hub-authenticated services, have changed their expiration from one hour to the expiry of the cookie in which they are stored (default: two weeks). This is now also configurable via JupyterHub.oauth_token_expires_in.

The result is that it should be much less likely for auth tokens stored in cookies to expire during the lifetime of a server.

Tested with five just now, found no errors 👍

Requirements check-list

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Already covered by existing tests.
• No change log entry required (why? e.g. invisible to users).
• No documentation update required.
• Created an issue at cylc-uiserver conda-forge repository with version changes (if you changed dependencies in setup.py, see recipe/meta.yaml).

[kinow]

Will let CI running, and tomorrow if the tests passed will create the Conda issue or PR

[kinow]

For complete changelog: https://jupyterhub.readthedocs.io/en/stable/changelog.html#id2

[dwsutherland]

Tested:

• start/stop hub
• start/stop UIS via hub
• logout/login
• interacting with workflows

All appears fine, and test here passed 👍