Use Yarn 2.4.0

[nicolo-ribaudo]

Q	A
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?	Yes, Yarn
License	MIT

The new Yarn version lets us remove some code from the publish plugin: nicolo-ribaudo/yarn-plugin-babel-release-tool@e56bcef

If the CRA e2e test fails, that's fixed by #12450.

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/34223/

[codesandbox-ci]

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Latest deployment of this branch, based on commit 83a8bc6:

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

[JLHwung]

We can also remove

babel/Makefile

Lines 239 to 244 in 2ba9265

	check-yarn-bug-1882:
	ifneq ("$(shell grep 3155328e5 .yarn/releases/yarn-*.cjs -c)", "0")
	echo "Your version of yarn is affected by https://github.com/yarnpkg/berry/issues/1882"
	echo "Please run `sed -i -e "s/3155328e5/4567890e5/g" .yarn/releases/yarn-*.cjs`"
	exit 1
	endif

now.

[merceyz]

We haven't merged yarnpkg/berry#2005 yet so you need to keep it for now

[nicolo-ribaudo]

Wait, I didn't run that sed command: why it isn't failing? 🤔

[nicolo-ribaudo]

Before the Makefile update:

➜ make check-yarn-bug-1882
echo "Your version of yarn is affected by https://github.com/yarnpkg/berry/issues/1882"
Your version of yarn is affected by https://github.com/yarnpkg/berry/issues/1882
echo "Please run `sed -i -e "s/3155328e5/4567890e5/g" .yarn/releases/yarn-*.cjs`"
Please run 
exit 1

After the Makefile update:

➜ make check-yarn-bug-1882
Your version of yarn is affected by https://github.com/yarnpkg/berry/issues/1882
Please run `sed -i -e s/3155328e5/4567890e5/g .yarn/releases/yarn-*.cjs`

(both are still exiting with 1)