Enable logical assignment in @babel/preset-env

Feature Request

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Logical assignment is Stage 4!

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This means that it should be enabled by default in @babel/preset-env 🎉

It should be done similarly to this commit: https://github.com/babel/babel/commit/b92ad318f173e1a0573a188324aa0c222ea35782

1. Add it to packages/babel-preset-env/src/available-plugins.js
2. Add the compat-table mapping to packages/babel-compat-data/scripts/data/plugin-features.js (you can find the correct feature name at https://kangax.github.io/compat-table/esnext/)
3. Run cd packages/babel-compat-data and yarn build-data to update the data about the supported browser versions
4. Update the test as needed (you don’t need to write new tests)
5. PR! 🎉

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If it is the first time that you contribute to Babel, follow these steps: (you need to have make and yarn available on your machine)

1. Write a comment there to let other possible contributors know that you are working on this bug.
2. Fork the repo
3. Run git clone https://github.com/<YOUR_USERNAME>/babel.git && cd babel
4. Run yarn && make bootstrap
5. Wait ⏳
6. Run make watch (or make build whenever you change a file)
7. Add a test if needed (only input.js; output.js will be automatically generated)
8. Update the code!
9. yarn jest babel-preset-env to run the tests
   • If some test outputs don’t match but the new results are correct, you can delete the bad output.js files and run the tests again
   • If you prefer, you can run OVERWRITE=true yarn jest babel-preset-env and they will be automatically updated.
10. If it is working, run make test to run all the tests
11. Run git push and open a PR!

[JLHwung]

@morrme I forgot to mention that we have a new feature branch feat-7.11.0/stage-4, if you just started working on this issue, I suggest you checkout that branch. You can see there is an es2021 item out there.

The PR should also target to feat-7.11.0/stage-4 instead of main.

[existentialism]

@morrme you can create a new mapping like so:

const es2021 = {
  "proposal-logical-assignment-operators": "Logical Assignment",
};

And then add es2021 to module.exports at the bottom!