Replace underscore with lodash in ancestors_tree

ee/app/assets/javascripts/sidebar/components/ancestors_tree/ancestors_tree.vue

 <script>
 import { GlLoadingIcon, GlLink, GlTooltip } from '@gitlab/ui';
-import { escape } from 'underscore';
+import { escape as esc } from 'lodash';
 
 import { __ } from '~/locale';
 import Icon from '~/vue_shared/components/icon.vue';
@@ -39,7 +39,7 @@ export default {
       // Fallback to None if immediate parent is unavailable.
 
       let { title } = immediateParent;
-      title = escape(title);
+      title = esc(title);
 
       const { humanReadableEndDate, humanReadableTimestamp } = immediateParent;
 

ee/spec/frontend/sidebar/ee_ancestor_tree_spec.js

 import Vue from 'vue';
-import { escape } from 'underscore';
+import { escape as esc } from 'lodash';
 import ancestorsTree from 'ee/sidebar/components/ancestors_tree/ancestors_tree.vue';
 import mountComponent from 'helpers/vue_mount_component_helper';
 
@@ -57,7 +57,7 @@ describe('AncestorsTreeContainer', () => {
 
   it('escapes html in the tooltip', () => {
     const title = '<script>alert(1);</script>';
-    const escapedTitle = escape(title);
+    const escapedTitle = esc(title);
 
     vm.$props.ancestors = [{ id: 1, url: '', title, state: 'open' }];