Chore: Update browserlist package to fix test errors

[gziolo]

Description

Fixes issue with the failing unit tests caused by one of the dependencies being out of date. As explained in detail by @afercia in #13385 (comment):

Note: locally, I get 2 tests failures:

• babel-plugin › .getTranslatorComment() › should not return translator comment on same line but after call expression
• Babel preset default › transpilation works properly

both seem related to:

    Expected mock function not to be called but it was called with:
    ["Browserslist: caniuse-lite is outdated ...

they happen also on master and seem completely unrelated to the changes in this PR.

In addition, I updated the following dependencies which also were using the outdated browserlist and caniuse-lite packages:

• "autoprefixer": "^9.4.5"
• "postcss": "^7.0.13"
• "stylelint": "^9.10.1"

First two dependencies had breaking changes so it causes some differences in the generated CSS code. In theory, it should be safe as they claim it should have the only impact on the code, because they claim to provide backward compatibility for IE:

We removed Node.js 4 and Node.js 9 support since it doesn’t have security updates anymore.

We removed IE and “dead” browsers (without security updates) from Babel’s targets. Don't worry, Autoprefixer still generate IE-compatible code. These changes affect websites which run Autoprefixer on client-side like CodePen.

There is a similar note for PostCSS.

How has this been tested?

npm test
npm run build

[afercia]

Thanks, all tests pass 👍

[gziolo]

@karmatosed, @jasmussen or @mapk - can you spot any visual differences in the editor with these changes applied? In theory, there should be no change, it should only contain some optimizations in the generated CSS.

I can't spot any issues on Chrome. I only can see some very small tweaks in the produced CSS when comparing old and new CSS.

[gziolo]

@afercia, I know you use IE, can you double check it doesn't regress with the additional commit applied?

[jasmussen]

Took this for a quick spin and did not see any regressions 👍 👍

[afercia]

I know you use IE,

I do, but only for testing purposes on a second laptop. I'll try to test it as soon as I have some spare time.

[youknowriad]

I don't really expect breakage and we have time to merge and test properly before 5.0

[gziolo]

Thanks for help everyone 🥇