Add metadata parameter to AuthContext

[hwo-wd]

Useful for providers missing proper CORS headers.

Continuation of #715 (comment)

Note:
I've tried running generate-docs but was unsuccessful:

yarn run v1.22.19
$ typedoc --gitRevision main --out docs src
[info] Loaded plugin typedoc-plugin-markdown
TypeDoc exiting with unexpected error:
TypeError: page.template is not a function
    at MarkdownTheme.render (D:\dev\work\temp\oidc-react\node_modules\typedoc-plugin-markdown\dist\theme.js:39:49)
    at Renderer.renderDocument (D:\dev\work\temp\oidc-react\node_modules\typedoc\dist\lib\output\renderer.js:183:40)
    at D:\dev\work\temp\oidc-react\node_modules\typedoc\dist\lib\output\renderer.js:159:22
    at Array.forEach (<anonymous>)
    at Renderer.render (D:\dev\work\temp\oidc-react\node_modules\typedoc\dist\lib\output\renderer.js:157:25)
    at async Application.generateDocs (D:\dev\work\temp\oidc-react\node_modules\typedoc\dist\lib\application.js:300:9)
    at async run (D:\dev\work\temp\oidc-react\node_modules\typedoc\dist\lib\cli.js:110:13)
error Command failed with exit code 6.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[simenandre]

Thank you very much! There seems to be a little formatting issue, but other than that I think this looks fine.

[hwo-wd]

Thanks, I've added the missing comma, should pass now 👍

[simenandre]

Btw, if you wanna contribute more, feel free to join our Discord server: discord.gg/SXMpgmPq5F

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@8462027). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #997   +/-   ##
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  Coverage        ?   98.91%           
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  Files           ?        1           
  Lines           ?       92           
  Branches        ?       35           
=======================================
  Hits            ?       91           
  Misses          ?        1           
  Partials        ?        0           

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[simenandre]

Released in https://github.com/bjerkio/oidc-react/releases/tag/v3.1.0