Throw exception on disposed RestClient

[kendallb]

Throw exception on using a disposed RestClient instance. We should always throw this one as it is pretty fatal so you would not want this to silently show up in the Exception response value.

Description

If you try to use a disposed instance right now, you get a silent exception buried inside HttpClient. With this change, it will throw immediately and cause the user code to fail as this is a pretty fatal problem.

Purpose

This pull request is a:

• New feature (non-breaking change which adds functionality)

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[repo-ranger]

⚠️ This issue has been marked wontfix and will be closed in 3 days