Upgrading node-auth0 from v3 to v4

[kushalshit27]

🔧 Changes

Upgrading node-auth0 from v3 to v4. This is a necessary upgrade because all new Auth0 features and dependency patches are getting released on v4 now.

This was originally attempted in https://github.com/auth0/auth0-deploy-cli/pull/887 but had a few changes that need to be reviewed. This should require a major version bump for Deploy CLI due to changes in v4.

TODO:
 - Sync with the master branch new commits ahead in the timeline.

📚 References Original PR: https://github.com/auth0/auth0-deploy-cli/pull/887

🔬 Testing

Deploy CLI commands like import, export

📝 Checklist

• [x] All new/changed/fixed functionality is covered by tests (or N/A)
• [ ] I have added documentation for all new/changed functionality (or N/A)