update jwt-go to v4

[TheAxZim]

Description

Updating the jwt-go library. Current version is vulnerable: https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-26160 -- this is a preview version but works the same way.

Information that is useful here:

• The What: Updating a library which is vulnerable.
• The Why: Security
• Type of change: Dependency update
• Breaking change: No
• Related to an issue: Consider upgrading version of jwt-go to fix security vulnerability #343
• Jira Version + Type: Cloud

[chipaca]

I'd suggest not doing this but landing #387 instead; from jwt-go's README,

THIS REPOSITORY IS NO LONGER MAINTANED

The new repository can be found at: https://github.com/golang-jwt/jwt

For more information, see issue #462.

[TheAxZim]

I'd suggest not doing this but landing #387 instead; from jwt-go's README,

THIS REPOSITORY IS NO LONGER MAINTANED

The new repository can be found at: https://github.com/golang-jwt/jwt
For more information, see issue #462.

Ah it seems like this notice of no longer being maintained was only added a few days after I made this PR. Thanks for catching!