message: fix(store): add type
diff: +import { Store } from 'redux';
  import configureStore from './configure-store';
  import { ReactFlowState, ConnectionMode } from '../types';
  @@ -56,7 +57,7 @@ export const initialState: ReactFlowState = {
  reactFlowVersion: typeof __REACT_FLOW_VERSION__ !== 'undefined' ? __REACT_FLOW_VERSION__ : '-',
  };
  -const store = configureStore(initialState);
  +const store: Store = configureStore(initialState);
  export type ReactFlowDispatch = typeof store.dispatch;
  