[klibertp]

Last time I checked on master - 2-3 months ago - ?. was implemented, but ?? was still missing. Good to see the implementation finalized. I also saw `overload` for inlines, that's really nice, having to expose functions taking Any and dispatching on dynamic type was one of the pain points in Haxe for me. A shame it's only for inline functions for now. Local static vars is something I didn't see, it looks like static variables in functions in C, right? I'm not quite sure how useful that would be. I guess the scopes are not shared, so `static var instance` in one method is different than `instance` declared the same way in another function. Still, the properties with getters also work. Better errors are always welcome, custom defines... I know I wanted these at some point, but can't recall right now what for. Stdlib got a bit more of concurrency support with Condition and Semaphore - good, my target doesn't do threading, but has coroutines, so having more options to control concurrency is nice.

All in all, very nice release with null-related operators being the feature I missed the most. I'm not sure about default type parameters, and numerical suffixes don't matter on my platform (everything is a double on runtime), but numerical separators are nice. Steadily, Haxe gets easier to use and safer. Macros are becoming more ergonomic, too, which is great, as they're essential to effective Haxe programming.