JSON Neo Tokio 0.2

[workingjubilee]

tokio 0.2 has a lot of pertinent updates for IPC. #485 appears to still be in-progress which is obviously blocking, but it would be good to know if there are any additional requirements beyond that before jsonrpc-* can move to a ^0.2 version of tokio. Feel free to close this issue if the answer is "The moment #485 closes, tokio 0.2 is also ready" or "No plans to make that available, please move to jsonrpsee."

[tomusdrw]

I don't see any obstacles to tokio-0.2 migration, I was considering it would be part of #485. That said, we don't currently have anyone actively working on migrating the transports due to lack of time. The jsonrpc vs jsonrpsee decision is yet to be made as well, so I unfortunately can't commit to anything. However jsonrpc, is a community project and I really hope that it can transcend paritytech's use of it.