Allow setting a custom transport when instantiating clients

[lawrencejones]

Hey 👋

I might be missing it, but I can't see any way to provide a custom http transport to the client.

For people building integrations inside larger applications, it's normal to provide a custom transport to provide standardised logging/tracing/retrying into their third-party clients.

Would you consider adding another client.Option that supports configuring a base transport?

Thanks!

[rocktavious]

Hey @lawrencejones - I would be open to this but I think that area of code to provide this is going to need a major refactor/cleanup so it might be a heavy lift. If you are willing to work on this refactor i'm open to reviewing and testing out your solution. Our team currently is a bit too small and behind on product features so we won't beable to take this on within our Q2 roadmap so it would have to wait to be scheduled for Q3. Let me know what you think. Thanks!

[zakisk]

@rocktavious @lawrencejones is the ideal solution for this problem, please review #263