[FEATURE] Support for local static variables

[Starexify]

Standard Haxe supports local static variables within functions to persist data between calls (as documented in the Haxe Manual).

Say we have this example code:

static function getData() {
		static var cache:Null<String> = null;
		if (cache == null) {
			cache = slowOperation();
		}
		return cache;
	}

	static function slowOperation() {
		trace("performing slow operation...");
		return "result";
	}

	static public function main() {
		trace(getData()); // performing slow operation... result
		trace(getData()); // result
	}

In haxe environments (expected behavior) we get this result:

performing slow operation... result
result
result

But in polymod this happens:

 ERROR  Error while parsing script assets/scripts/WorstCParser.hxc#11: EUnexpected
Unexpected error: Unexpected token "var", is there invalid syntax on this line?