v0.17.18: Update latest substrate (#776)

* update latest substrate polkadot-master

* fix test compilation

* bump version to 0.7.18

* bump impl_version

* update substrate

* Revert "Instantiate environment with asynchronous API (#768)"

This reverts commit a5d9645bf4.

* update substrate

* remove unused parameter type

* bump trie-db version for tests

* fix collator test

* update substrate

* remove unnecessary service changes

polkadot/collator/src/lib.rs

@@ -425,7 +425,7 @@ fn run_collator_node<S, E, P, Extrinsic>(
 						);
 
 						let exit = inner_exit_2.clone();
-						tokio::spawn(future::select(res.boxed(), exit).map(drop));
+						tokio::spawn(future::select(res.boxed(), exit).map(drop).map(|_| Ok(())).compat());
 					})
 				});
 
@@ -449,7 +449,7 @@ fn run_collator_node<S, E, P, Extrinsic>(
 					inner_exit.clone()
 				).map(drop);
 
-			tokio::spawn(future);
+			tokio::spawn(future.map(|_| Ok(())).compat());
 			future::ready(())
 		});