refactor(store): use redux instead of easy-peasy

src/store/configure-store.ts

@@ -0,0 +1,11 @@
+import { applyMiddleware, compose, createStore, Store } from 'redux';
+import thunkMiddleware from 'redux-thunk';
+
+import { ReactFlowState, reactFlowReducer } from './index';
+
+export default function configureStore(preloadedState: ReactFlowState): Store<ReactFlowState> {
+  const composedEnhancers = compose(applyMiddleware(thunkMiddleware));
+  const store = createStore(reactFlowReducer, preloadedState, composedEnhancers);
+
+  return store;
+}