fix: add pnpm v4 support

[B4rtware]

in pnpm v4 the option '--loglevel' is no longer available instead '--reporter' is used.

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

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Underlying tools
• Other, please describe:

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

• Yes
• No

Other information:
--reporter silent should replicate --loglevel error
and --shamefully-flatten was renamed to --shamefully-hoist

[pksunkara]

Maybe it's better if you read pnpm version and set all the flags at once instead of so much duplicated code

[B4rtware]

Maybe it's better if you read pnpm version and set all the flags at once instead of so much duplicated code

You are right! I will try to find a solution.

[vue-bot]

Hey @B4rtware, thank you for your time and effort spent on this PR, contributions like yours help make Vue better for everyone. Cheers! 💚