#priv in
* Enable ergonomic brand checks by default in `@babel/parser` * Enable ergonomic brand checks by default in `preset-env` * Fix error position * Update Babel 8 tests
https://github.com/tc39/proposal-private-fields-in-in Co-Authored-By: Nicolò Ribaudo <nicolo.ribaudo@gmail.com> Co-Authored-By: Huáng Jùnliàng <jlhwung@gmail.com>