feat[oidc-middleware] Allow multiple instances of ExpressOIDC to co-exist

[heidemn]

…xist

The previous use of a static Passport instance prevented the parallel
use of multiple ExpressOIDC instances. Adding the Passport instance to
the context makes this possible.

Resolves: #497

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Adding Tests
• Build related changes
• CI related changes
• Documentation changes
• Other... Please describe:

What is the current behavior?

Issue Number: #497

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Reviewers

[peterhriser]

is this thing still alive. This is a pretty important change I think?

[heidemn]

@peterhriser sorry for the late reply.
Feel free to continue this PR if needed. Our company no longer uses this package.

[ashermanwmf]

Hello, I work for Twitter and my team uses this package for our web app. We need this PR change to support our web apps auth strategy.

What are the next steps for this PR? Can it be reviewed/approved?