* Revert "Remove mutation in `printBinaryishExpressions` (#1067)"
This reverts commit e7312ad7b2.
* Revert "Make it clear what parser was used in each snapshot (#1068)"
This reverts commit 4f7ae4815b.
ast-types was missing a type, I sent a PR on ast-type ( https://github.com/benjamn/ast-types/pull/211 ) which was merged and released (thanks @benjamn for being super quick!). So I'm upgrading ast-types and add the test in this PR.
Fixes#1007