Integrate token swap pallet into Millau runtime (#1099)

* integrate token swap pallet into Millau runtime

* set OnDeliveryConfirmed callback in Millau runtime

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;