add shouldReturnURI to configuration

[mattupham]

📦 Pull Request

• When trying to implement Magic's loginWithRedirect social login, the social providers won't display redirect in an iframe
• We should return a URI optionally in this specific use case

🚨 Test instructions

• Create a demo app that integrates loginWithRedirect - [link](https://magic.link/docs/api/client-side-sdks/web#loginwithredirect)
  • loginWithRedirect v1
    • Ensure URI is returned on resolve
  • loginWithRedirect v2
    • Ensure URI is returned on resolve

⚠️ Don't forget to add a semver label!

Please 🚨 ONLY ADD ONE 🚨 of the following labels, failing to do so may lead to adverse versioning of your changes when published:

• minor: New Feature

Special Note

• intended for indiviudal use

📦 Published PR as canary version: Canary Versions

:sparkles: Test out this PR locally via: ```bash npm install @magic-ext/oauth@20.1.0-canary.723.8272719151.0 npm install @magic-ext/oauth2@6.1.0-canary.723.8272719151.0 npm install @magic-sdk/pnp@20.1.0-canary.723.8272719151.0 # or yarn add @magic-ext/oauth@20.1.0-canary.723.8272719151.0 yarn add @magic-ext/oauth2@6.1.0-canary.723.8272719151.0 yarn add @magic-sdk/pnp@20.1.0-canary.723.8272719151.0 ```