require jQuery to be explicitly imported

spec/javascripts/toggle_buttons_spec.js

+import $ from 'jquery';
 import setupToggleButtons from '~/toggle_buttons';
 import getSetTimeoutPromise from './helpers/set_timeout_promise_helper';

spec/javascripts/u2f/authenticate_spec.js

+import $ from 'jquery';
 import U2FAuthenticate from '~/u2f/authenticate';
 import 'vendor/u2f';
 import MockU2FDevice from './mock_u2f_device';

spec/javascripts/u2f/register_spec.js

+import $ from 'jquery';
 import U2FRegister from '~/u2f/register';
 import 'vendor/u2f';
 import MockU2FDevice from './mock_u2f_device';

spec/javascripts/version_check_image_spec.js

+import $ from 'jquery';
 import VersionCheckImage from '~/version_check_image';
 import ClassSpecHelper from './helpers/class_spec_helper';

spec/javascripts/vue_shared/components/gl_modal_spec.js

+import $ from 'jquery';
 import Vue from 'vue';
 import GlModal from '~/vue_shared/components/gl_modal.vue';
 import mountComponent from 'spec/helpers/vue_mount_component_helper';

spec/javascripts/vue_shared/components/markdown/field_spec.js

+import $ from 'jquery';
 import Vue from 'vue';
 import fieldComponent from '~/vue_shared/components/markdown/field.vue';

spec/javascripts/vue_shared/components/modal_spec.js

+import $ from 'jquery';
 import Vue from 'vue';
 import modal from '~/vue_shared/components/modal.vue';
 import mountComponent from 'spec/helpers/vue_mount_component_helper';

spec/javascripts/vue_shared/directives/tooltip_spec.js

+import $ from 'jquery';
 import Vue from 'vue';
 import tooltip from '~/vue_shared/directives/tooltip';

spec/javascripts/zen_mode_spec.js

+import $ from 'jquery';
 import Mousetrap from 'mousetrap';
 import Dropzone from 'dropzone';
 import ZenMode from '~/zen_mode';