Add support for encoding option to jws.decode, and fix forwarding of …

[loucadufault]

Description

(trivially) Adds support for encoding option to jws.decode API by passing this encoding from opts to payloadFromJWS. Also, fixes the broken encoding option currently documented for the jws.createVerify API, by properly passing the encoding option to be wrapped in an object passed to implementation call to decode.

This change should make this option functional for both these APIs.

References

Largely the same code change as proposed in #86, with change to remove passing of encoding option to JSON.parse as this is ignored, and properly forward option from VerifyStream.proto.verify method (and fix conflicts and clean history).

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

[glensc]

The removal of wrong use of reviver parameter also in this PR:

• Cleanup: Remove unsupported opts.encoding to JSON.parse #108