feat: export manualUpdateProject

So we can trigger the saving of a project from outside the GUI
component.

Co-authored-by: James Mead <james.mead@gofreerange.com>

Author: sebjacobs

packages/scratch-gui/src/index.ts

@@ -4,7 +4,7 @@ import {legacyConfig} from './legacy-config';
 export {default} from './containers/gui.jsx';
 export {default as GUIComponent} from './components/gui/gui.jsx';
 export {default as AppStateHOC} from './lib/app-state-hoc.jsx';
-export {remixProject} from './reducers/project-state.js';
+export {manualUpdateProject, remixProject} from './reducers/project-state.js';
 export {setAppElement} from 'react-modal';
 
 export {legacyConfig};