companion pr for #6235 (#1215)

* companion pr for paritytech/substrate#6235

* ???

* nah doesn't work for my branch

* bump Cargo.lock

* bump kusama spec versin

* bump kusama spec version

* revert to master

* bump Cargo.lock

Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/runtime/test-runtime/client/Cargo.toml

@@ -8,6 +8,7 @@ license = "GPL-3.0"
 [dependencies]
 sc-block-builder = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sc-consensus = { git = "https://github.com/paritytech/substrate", branch = "master" }
+sc-light = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sc-service = { git = "https://github.com/paritytech/substrate", branch = "master", features = ["test-helpers"],  default-features = false }
 substrate-test-client = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "master" }

polkadot/runtime/test-runtime/client/src/lib.rs

@@ -30,11 +30,11 @@ use sp_runtime::traits::{Block as BlockT, Header as HeaderT, Hash as HashT, Hash
 use sc_consensus::LongestChain;
 use sc_client_api::light::{RemoteCallRequest, RemoteBodyRequest};
 use sc_service::client::{
-	light::{
+	genesis, Client as SubstrateClient, LocalCallExecutor
+};
+use sc_light::{
 	call_executor::GenesisCallExecutor, backend as light_backend,
 	new_light_blockchain, new_light_backend,
-	},
-	genesis, Client as SubstrateClient, LocalCallExecutor
 };
 
 /// A prelude to import in tests.