express oauth2 bearer update

[NotMyself]

The express-oauth2-bearer package is being renamed to express-oauth2-jwt-bearer. This PR makes the source changes needed to switch to the new dependency.

Prior to merging, Absorb needs to be updated. See comment below.

[NotMyself]

@auth0aaron Before I can merge these changes the existing labs in absorb will need to be updated. These slides need to be updated to reference express-oauth2-jwt-bearer instead of express-oauth2-bearer.

[NotMyself]

@adamjmcgrath when this PR is merged the current labs will be migrated to the new express-oauth2-jwt-bearer dependency. I will still need to update our new labs that are in progress. I will let you know when complete.

[NotMyself]

It looks like there are differences between the packages. The ALLOWED_AUDIENCES envvar was changed to AUDIENCE which will ripple to quite a few changes.

[adamjmcgrath]

lgtm thanks @NotMyself

The ALLOWED_AUDIENCES envvar was changed to AUDIENCE which will ripple to quite a few changes.

Yep - this env var has changed. apologies...

[NotMyself]

No worries @adamjmcgrath. We use magic links to deploy into Vercel. These links reference the required envvars. So they will need to be updated as well. So it will take a bit longer than anticipated but not a big deal.