Integrate token swap pallet into Millau runtime (#1099)

* integrate token swap pallet into Millau runtime

* set OnDeliveryConfirmed callback in Millau runtime

bridges/primitives/messages/src/source_chain.rs

@@ -136,7 +136,7 @@ pub trait MessagesBridge<AccountId, Balance, Payload> {
 	///
 	/// Returns unique message nonce or error if send has failed.
 	fn send_message(
-		sender: AccountId,
+		sender: Sender<AccountId>,
 		lane: LaneId,
 		message: Payload,
 		delivery_and_dispatch_fee: Balance,

bridges/primitives/token-swap/src/lib.rs

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
 
+#![cfg_attr(not(feature = "std"), no_std)]
+
 use codec::{Decode, Encode};
 use frame_support::RuntimeDebug;
 use sp_core::U256;