build: install dependency for vue-server-renderer in setup script

[jkzing]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the dev branch for v2.x (or to a previous version branch), not the master branch
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• All tests are passing: https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md#development-setup
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

Currently when running npm test, an error occurs:

packages/vue-server-renderer/types/index.d.ts(1,44): error TS2307: Cannot find module 'vue'.

It's because that vue-server-renderer dependencies are missing, simply run npm install under packages/vue-server-renderer could solve that.

This PR is trying to improve setup script so that new contributor can run npm test successfully.

[HerringtonDarkholme]

This can be solved by one simple tsconfig.json, so we can get simpler build script and fewer deps. (I wonder how CI works because I also encounter this locally. @ktsn )

waht's your opinion? @yyx990803 @jkzing

[yyx990803]

If there's an easier way to deal with this, yes please!

[jkzing]

@HerringtonDarkholme It would be much better if we can skip npm install, I just didn't figure out how to do it...😅