Support extensions in useSubscription

[jcostello-atlassian]

The graphql-ws spec lists an optional extensions object on subscribe messages

https://github.com/enisdenjo/graphql-ws/blob/master/PROTOCOL.md

[alessbell]

Hi @jcostello-atlassian 👋 I'll echo what @phryneas said over on your PR - thanks for opening it and we'll review it as soon as we're able to :)

[phryneas]

Version 3.11 has been released with this feature. Thank you again for the pull request!

[github-actions]

Do you have any feedback for the maintainers? Please tell us by taking a one-minute survey. Your responses will help us understand Apollo Client usage and allow us to serve you better.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
For general questions, we recommend using StackOverflow or our discord server.