Node.js 14: Unsuported operator in 9.x

[marcoslor]

• @testing-library/dom version: 9.3
• node version: 14.x

I believe there is a single operator in the sourcecode that made 9.x drop support for node 14.x early. It is a &&= operator, which was added in Node 15.

It was commited in the 9.2 release: eadf748

Since I could not find any warnings of dropped Node 14 support in 9.2 (seem to have happened here before 10.x), I think this may have been a mistake, and may be worth a patch.

In which version was support for 14.x oficially dropped?

Thanks!

[eps1lon]

We don't backport fixes unless security related.