Merge branch 'dev' of https://github.com/oslabs-beta/react-time-travel into dev

Author: joshua0308

docker-compose.yml

@@ -5,7 +5,5 @@ services:
     container_name: reacttt-test-lint
     volumes:
       - .:/usr/src/app
-      - node_modules:/usr/src/app/node_modules
+      - /usr/src/app/node_modules
     command: bash -c "npm run lint && npm test"
-volumes:
-  node_modules:

src/app/__tests__/action.test.jsx

@@ -56,12 +56,12 @@ describe('unit testing for Action.jsx', () => {
     });
 
     test('should invoke dispatch method when clicked', () => {
-      wrapper.find('.jump-button').simulate('click', { stopPropagation() { } });
+      wrapper.find('.jump-button').simulate('click', { stopPropagation() {} });
       expect(props.dispatch).toHaveBeenCalled();
     });
 
     test('dispatch should send a changeSlider action', () => {
-      wrapper.find('.jump-button').simulate('click', { stopPropagation() { } });
+      wrapper.find('.jump-button').simulate('click', { stopPropagation() {} });
       expect(props.dispatch.mock.calls[0][0]).toEqual(changeSlider(props.index));
     });
   });