rpc server with HTTP/WS on the same socket (#12663)

* jsonrpsee v0.16

add backwards compatibility

run old http server on http only

* cargo fmt

* update jsonrpsee 0.16.1

* less verbose cors log

* fix nit in log: WS -> HTTP

* revert needless changes in Cargo.lock

* remove unused features in tower

* fix nits; add client-core feature

* jsonrpsee v0.16.2

substrate/client/rpc/src/system/tests.rs

@@ -21,7 +21,7 @@ use assert_matches::assert_matches;
 use futures::prelude::*;
 use jsonrpsee::{
 	core::Error as RpcError,
-	types::{error::CallError, EmptyParams},
+	types::{error::CallError, EmptyServerParams as EmptyParams},
 	RpcModule,
 };
 use sc_network::{self, config::Role, PeerId};