Optional chaining reached stage 4!

https://twitter.com/NicoloRibaudo/status/1202323456899067906

This means that... it should be soon enabled by default in @babel/preset-env and in @babel/parser.

There are two issues to track progress:

• Enable optional chaining by default in @babel/preset-env babel/babel#10809
• Enable optional chaining by default in @babel/parser babel/babel#10810

Once those two packages are updated and published to npm we should take an action and update @wordpress/babel-preset-default and all other packages using Babel to use the latest version of all Babel packages.

Resources

• https://tc39.es/proposal-optional-chaining/
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining
• https://2ality.com/2019/07/optional-chaining.html