verson 4.5.0 dosen't suport npm5.6.0

[jerry000lin]

Version

4.5.0

Environment info

npm 5.6.0
node 8.11.3

Steps to reproduce

in npm 5.6.0

execute npm install with @vue/cli-service v4.5.0

get error:

error in npm install
npm ERR! code EUNSUPPORTEDPROTOCOL
npm ERR! Unsupported URL Type "npm:": npm:vue-loader@^16.0.0-beta.3

What is expected?

npm install can be executed in npm5.6.0

What is actually happening?

@vue/cli-service v4.5.0 dosen't support npm 5.6.0

---

Notice that package aliasing is support since npm 6.9.0

Will npm5.6.0 be supported again?

[haoqunjiang]

Yeah, we can make it an optional dependency. Thanks for reporting this!

[Memeyan]

My personal solution it's just updated npm to version 6 and then it's just work
also, I suspect that when you install npm and node you use apt-get method directly on ubuntu, which causes that it's only installed you node 8 and npm 5, the resent version of a node is already 14