test: add vue ssr spec

[pawelphilipczyk-cloudinary]

Pull request for cloudinary/frontend-frameworks

For which package is this PR?

@cluodinary/vue

What does this PR solve?

Adds SSR tests for Vue based on React's SSR test file.

Final checklist

• [x] Implementation is aligned to Spec.
• [x] Tests - Add proper tests to the added code.
• [ ] Relates to a github issue (link to issue).