ensure imbalances are properly accounted for (#2183)

* ensure imbalances are properly accounted for

* bump runtime version

* Update node/runtime/src/lib.rs

substrate/node/runtime/src/lib.rs

@@ -60,7 +60,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	impl_name: create_runtime_str!("substrate-node"),
 	authoring_version: 10,
 	spec_version: 56,
-	impl_version: 59,
+	impl_version: 60,
 	apis: RUNTIME_API_VERSIONS,
 };