Printing the first line of a binary expression next to the `=` leads to weird cases where the first expression is parenthesised and doens't read well with chained conditionals as they don't align well. This makes it behave the same was as `if` tests.
Fixes#863
* WIP immediate feedback
* typescript parser is drop-in replacement for flow parser
* Add new TypeScript Parser snapshots where drop-in replacement possible
* Snapshot updates after rebasing
* Remove unnecessary stripping of properties on TypeScript parser AST
* Remove annotated issues
* Move TS dependencies to dev for now
Christopher Chedeau