GitLab

make sure order channels are consumed in repsonse collector doesn't block sends on the other

Make the request manager actually inject responses from the network, and perform a selector
verification

Convert GraphSyncRequest and GraphSyncResponse to structs, track by value, pass directly into add
methods on GraphSyncMessage

Handle failed request status codes from server and pass on errors

Cleanup request manager test to extract repeated code

Add a channel of asynchronous errors instead of only an initial synchronous one

Create a manager for outgoing requests