refactor(app): rename react-graph to react-flow

src/index.js

@@ -1,6 +1,6 @@
-import ReactGraph from './ReactGraph';
+import ReactFlow from './container/Editor';
 
-export default ReactGraph;
+export default ReactFlow;
 
 export { default as Handle } from './components/Handle';
 export { default as MiniMap } from './plugins/MiniMap';