Use workspace:^ to specify @babel/ dependencies

[nicolo-ribaudo]

Q	A
Tests Added + Pass?	Yes
License	MIT

When workspace:^, yarn automatically replaces it with the correct version (still using the ^ marker) at pack time. This has the advantage that we stop getting conflicts due to package.json changes, since dependencies won't be modified on publish anymore. Yarn uses this feature for their monorepo: yarnpkg/berry#3431

[merceyz]

while in theory this should work, I get this error:

The feature was added in yarnpkg/berry#3386 which is currently in a canary release

yarn set version canary

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit e76a1b6:

Sandbox	Source
babel-repl-custom-plugin	Configuration
babel-plugin-multi-config	Configuration

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/49382/

[nicolo-ribaudo]

I updated this PR to also use workspace:^ in devDependencies: there is no need to distinguish workspace:^ and workspace:*.

[hzoo]

Cool, so when we publish it'll auto update to the version, found the url https://yarnpkg.com/features/workspaces/#publishing-workspaces (dont know if we want to specify these kinds of things in our contributing, I guess it's enforced too?)

[nicolo-ribaudo]

Yeah it's enforced by the constraints file (and rbh I think most contributors won't even notice).