update to 4.3.4
* General improvements:
+ all : allow @:using with Class and Enum
+ display : expose list of metadata/defines
* Bugfixes:
+ all : typedef vs. GADT
+ all : don't double-throw exceptions
+ all : fix some abstract inlining failures
+ all : fix JsonPrinter empty parent class
+ all : dce: clean up operator handling
+ all : analyzer: deal with unreachable block in binops
+ all : analyzer: don't recursively check enum values when const propagating
+ all : analyzer: fix check for inlined purity meta
+ display : fix errors from parser missing in diagnostics
+ display : fix display services with static extension
+ display : fix display services with safe navigation
+ hl : hlopt rework try-catch control flow
+ hl/c : fix reserved keywords
* Deprecation / future version handling:
+ all : don't infer string on concat, when using -D haxe-next
+ all : handle optional arguments with bind, when using -D haxe-next
+ macro : build order vs inheritance, when using -D haxe-next
+ macro : deprecate some API from haxe.macro.Compiler
+ java/jvm : warn about --java ... -D jvm vs --jvm ...
* Details can be found in the issues references in
https://github.com/HaxeFoundation/haxe/releases/tag/4.3.4