Check that `URLSessionClient` hasn't been invalidated before sending#1489

Merged

designatednerd merged 3 commits intomainfrom

add/invalidation-error

Nov 2, 2020

Commits on Oct 30, 2020

Add error if someone's trying to create a new request after a session has been invalidated
designatednerd
committed
add test to make sure proper error is returned after invalidation
designatednerd
committed
Fix possible retain cycle in network fetch interceptor
designatednerd
committed

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