Djblets 3.1 now depends on the typing_extensions package. We're using

4.4 (latest version) as the minimum.
The package now indicates it offers type hinting through a py.typed

marker.
Release notes have been updated to include all the new changes in

djblets.secrets and djblets.webapi, including token deprecation and

URI template name conflict handling.

Installed the package in a new environment and verified typing_extensions

was installed.
Built the release notes. Checked for bad links, build issues, and spelling

errors.