fix: add undeclared peer dependency webpack and @vue/compiler-sfc

[merceyz]

What's the problem this PR addresses?

vue-loader@16 depends on webpack and @vue/compiler-sfc but doesn't declare it

Fixes #1844

How did you fix it?

Added webpack and @vue/compiler-sfc as peer dependencies

[sodatea]

Thanks!

[landerson-gc]

@sodatea This appears to be causing an unmet peer dep error for vue2 projects

npm ERR! peer dep missing: @vue/compiler-sfc@^3.0.8, required by vue-loader@16.3.2

relevant deps:

"vue": "^2.6.12",
"@vue/cli-service": "4.5.12",

[landerson-gc]

fix appears to be adding:

"vue-loader-v16": "npm:vue-loader@16.3.1",

to ones package.json

[Schweinepriester]

having the same issue as @landerson-gc with vue2 and can confirm the fix appears to be working, at least for installing. i went with downgrading "@vue/cli-service": "~4.5.13" to "@vue/cli-service": "~4.4.6" as an alternative fix. i'm hoping this will be fixed properly though.

[sodatea]

Fixed in v16.3.3