feat: update strategy to new linkedin implementation

[ncluer]

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Description

Update strategy to use new LinkedIn implementation as previous was deprecated.

References

https://learn.microsoft.com/en-us/linkedin/consumer/integrations/self-serve/sign-in-with-linkedin
https://learn.microsoft.com/en-us/linkedin/consumer/integrations/self-serve/sign-in-with-linkedin-v2

Testing

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not the default branch

[aalishanjami]

@jamescgarrett can you also update npm version. It is still on version 2.0 and these changes are not reflecting there