fix(edges): updatable edge

example/src/index.tsx

@@ -10,6 +10,7 @@ import FloatingEdges from './FloatingEdges';
 import Layouting from './Layouting';
 import NestedNodes from './NestedNodes';
 import Hidden from './Hidden';
+import UpdatableEdge from './UpdatableEdge';
 
 import './index.css';
 
@@ -46,6 +47,10 @@ const routes = [
     path: '/hidden',
     component: Hidden,
   },
+  {
+    path: '/updatable-edge',
+    component: UpdatableEdge,
+  },
 ];
 
 const Header = withRouter(({ history, location }) => {