test: use vitest snapshot testing, update snapshot

[9romise]

• Fix the CI
• Replace manual updating snapshot with vitest automatic updating.
• Remove unused scripts. We can run vitest --update or press u in an interactive vitest session to update snapshots now.
• Remove unused deps:
  • npm-run-all
  • wait-on
  • warun

[9romise]

I can't reproduce the lint error from CI locally.

[FloEdelmann]

I can't reproduce the lint error from CI locally.

Have you tried removing node_modules and re-running npm install? In the CI, always the newest versions are pulled, while npm install locally does nothing if a matching version (e.g. 1.2.3 for ^1.1.0) is already installed, even if a newer one (e.g. 1.8.7) is available.

[9romise]

I tried upgrading Prettier to the latest version locally, and it resolved the issue.

[FloEdelmann]

@ota-meshi could you please review this, so that it unblocks #278, which in turn (after a release) would unblock vuejs/eslint-plugin-vue#3002?

[ota-meshi]

Thank you so much! LGTM!
Sorry for the late reply.