update boards_bundle to ES module syntax

app/assets/javascripts/boards/boards_bundle.js

@@ -6,23 +6,22 @@ import Vue from 'vue';
 import VueResource from 'vue-resource';
 import FilteredSearchBoards from './filtered_search_boards';
 import eventHub from './eventhub';
-
-require('./models/issue');
-require('./models/label');
-require('./models/list');
-require('./models/milestone');
-require('./models/assignee');
-require('./stores/boards_store');
-require('./stores/modal_store');
-require('./services/board_service');
-require('./mixins/modal_mixins');
-require('./mixins/sortable_default_options');
-require('./filters/due_date_filters');
-require('./components/board');
-require('./components/board_sidebar');
-require('./components/new_list_dropdown');
-require('./components/modal/index');
-require('../vue_shared/vue_resource_interceptor');
+import './models/issue';
+import './models/label';
+import './models/list';
+import './models/milestone';
+import './models/assignee';
+import './stores/boards_store';
+import './stores/modal_store';
+import './services/board_service';
+import './mixins/modal_mixins';
+import './mixins/sortable_default_options';
+import './filters/due_date_filters';
+import './components/board';
+import './components/board_sidebar';
+import './components/new_list_dropdown';
+import './components/modal/index';
+import '../vue_shared/vue_resource_interceptor';
 Vue.use(VueResource);

app/assets/javascripts/boards/components/board.js

@@ -3,9 +3,7 @@
 import Vue from 'vue';
 import boardList from './board_list';
 import boardBlankState from './board_blank_state';
-
-require('./board_delete');
-require('./board_list');
+import './board_delete';
 const Store = gl.issueBoards.BoardsStore;

app/assets/javascripts/boards/components/board_card.js

-require('./issue_card_inner');
+import './issue_card_inner';
 const Store = gl.issueBoards.BoardsStore;

app/assets/javascripts/boards/components/board_sidebar.js

@@ -7,11 +7,9 @@
 import Vue from 'vue';
 import eventHub from '../../sidebar/event_hub';
-
 import AssigneeTitle from '../../sidebar/components/assignees/assignee_title';
 import Assignees from '../../sidebar/components/assignees/assignees';
-
-require('./sidebar/remove_issue');
+import './sidebar/remove_issue';
 const Store = gl.issueBoards.BoardsStore;

app/assets/javascripts/boards/components/modal/footer.js

@@ -2,8 +2,7 @@
 /* global Flash */
 import Vue from 'vue';
-
-require('./lists_dropdown');
+import './lists_dropdown';
 const ModalStore = gl.issueBoards.ModalStore;

app/assets/javascripts/boards/components/modal/header.js

 import Vue from 'vue';
 import modalFilters from './filters';
-
-require('./tabs');
+import './tabs';
 const ModalStore = gl.issueBoards.ModalStore;

app/assets/javascripts/boards/components/modal/index.js

@@ -3,11 +3,10 @@
 import Vue from 'vue';
 import queryData from '../../utils/query_data';
 import loadingIcon from '../../../vue_shared/components/loading_icon.vue';
-
-require('./header');
-require('./list');
-require('./footer');
-require('./empty_state');
+import './header';
+import './list';
+import './footer';
+import './empty_state';
 const ModalStore = gl.issueBoards.ModalStore;