fix(deps): update dependency jwt-decode to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
jwt-decode	dependencies	major	^2.2.0 -> ^3.0.0

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Release Notes

auth0/jwt-decode

v3.0.0

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• Include an ESM build for native JavaScript imports

Warning: this version has some potentially breaking changes!

• If you've previously imported the library as import * as jwt_decode from 'jwt-decode', you'll have to change your import to import jwt_decode from 'jwt-decode';.

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[erezrokah]

We're using CommonJS

netlify-lambda/lib/serve.js

Line 7 in 857e5b2

var jwtDecode = require('jwt-decode');

so this is not a breaking change for us:
https://github.com/auth0/jwt-decode#use-as-a-commonjs-package