Merge branch 'upgrade-bootstrap-vue/specs-update-packages' into 'master'

Make packages specs compatible w/ BootstrapVue 2

See merge request gitlab-org/gitlab!20506

ee/spec/frontend/packages/details/components/app_spec.js

@@ -26,6 +26,8 @@ describe('PackagesApp', () => {
 
     wrapper = mount(PackagesApp, {
       propsData,
+      sync: false,
+      attachToDocument: true,
     });
   }