Merge branch 'leipert-dedupe-vue' into 'master'

Update to Vue 2.5.21

Closes #55592

See merge request gitlab-org/gitlab-ce!23969

spec/javascripts/ide/components/file_finder/index_spec.js

@@ -56,7 +56,6 @@ describe('IDE File finder item spec', () => {
 
     it('renders list of blobs', () => {
       expect(vm.$el.textContent).toContain('index.js');
-      expect(vm.$el.textContent).toContain('component.js');
       expect(vm.$el.textContent).not.toContain('folder');
     });
 

yarn.lock

@@ -9887,9 +9887,9 @@ vue-style-loader@^4.1.0:
     loader-utils "^1.0.2"
 
 vue-template-compiler@^2.5.0, vue-template-compiler@^2.5.17:
-  version "2.5.17"
-  resolved "https://registry.yarnpkg.com/vue-template-compiler/-/vue-template-compiler-2.5.17.tgz#52a4a078c327deb937482a509ae85c06f346c3cb"
-  integrity sha512-63uI4syCwtGR5IJvZM0LN5tVsahrelomHtCxvRkZPJ/Tf3ADm1U1wG6KWycK3qCfqR+ygM5vewUvmJ0REAYksg==
+  version "2.5.21"
+  resolved "https://registry.yarnpkg.com/vue-template-compiler/-/vue-template-compiler-2.5.21.tgz#a57ceb903177e8f643560a8d639a0f8db647054a"
+  integrity sha512-Vmk5Cv7UcmI99B9nXJEkaK262IQNnHp5rJYo+EwYpe2epTAXqcVyExhV6pk8jTkxQK2vRc8v8KmZBAwdmUZvvw==
   dependencies:
     de-indent "^1.0.2"
     he "^1.1.0"
@@ -9904,12 +9904,7 @@ vue-virtual-scroll-list@^1.2.5:
   resolved "https://registry.yarnpkg.com/vue-virtual-scroll-list/-/vue-virtual-scroll-list-1.2.5.tgz#bcbd010f7cdb035eba8958ebf807c6214d9a167a"
   integrity sha1-vL0BD3zbA166iVjr+AfGIU2aFno=
 
-vue@^2.5.17:
-  version "2.5.17"
-  resolved "https://registry.yarnpkg.com/vue/-/vue-2.5.17.tgz#0f8789ad718be68ca1872629832ed533589c6ada"
-  integrity sha512-mFbcWoDIJi0w0Za4emyLiW72Jae0yjANHbCVquMKijcavBGypqlF7zHRgMa5k4sesdv7hv2rB4JPdZfR+TPfhQ==
-
-vue@^2.5.21:
+vue@^2.5.17, vue@^2.5.21:
   version "2.5.21"
   resolved "https://registry.yarnpkg.com/vue/-/vue-2.5.21.tgz#3d33dcd03bb813912ce894a8303ab553699c4a85"
   integrity sha512-Aejvyyfhn0zjVeLvXd70h4hrE4zZDx1wfZqia6ekkobLmUZ+vNFQer53B4fu0EjWBSiqApxPejzkO1Znt3joxQ==