Port dav calendar settings page to Vue.js

- Drop reliance on deprecated global jQuery object.
- Allow testing user interactions.
- Use newer technology stack.

---

Test user interactions with the groupware dav settings

Add infrastructure to test Vue components:

- Use recommended libraries:

    - https://vuejs.org/v2/guide/testing.html#Recommendations
    - Use jest-dom for robust assertions on the DOM state
    - Use user-event to be more representative of user actions

- Code is transpiled by Jest, with the help of vue-jest.

Ignore test files for no-unpublished-import. Prevent ESLint from
flagging:

```
/home/runner/work/server/server/apps/dav/src/views/CalDavSettings.spec.js
Error:   1:24  error  "@testing-library/vue" is not published         node/no-unpublished-import
Error:   2:23  error  "@testing-library/user-event" is not published  node/no-unpublished-import
```

Signed-off-by: François Freitag <mail@franek.fr>

1 files changed, 2 insertions, 0 deletions

diff --git a/webpack.common.js b/webpack.common.js
index 9d800139aff..5c067b3e8bf 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -8,6 +8,7 @@ const accessibility = require('./apps/accessibility/webpack')
 const comments = require('./apps/comments/webpack')
 const core = require('./core/webpack')
 const dashboard = require('./apps/dashboard/webpack')
+const dav = require('./apps/dav/webpack')
 const files = require('./apps/files/webpack')
 const files_sharing = require('./apps/files_sharing/webpack')
 const files_trashbin = require('./apps/files_trashbin/webpack')
@@ -26,6 +27,7 @@ const modules = {
 	comments,
 	core,
 	dashboard,
+	dav,
 	files,
 	files_sharing,
 	files_trashbin,