fix syntax for haxe 3.4.x (see #673)

.travis.yml

@@ -8,9 +8,9 @@ haxe:
   - "3.4.7"
   - "4.0.0-rc.4"
 
-matrix:
-  allow_failures:
-    - haxe: "3.4.7"
+#matrix:
+#  allow_failures:
+#    - haxe: "3.4.7"
 
 install:
   - yes | haxelib install all

hxd/fs/FileConverter.hx

@@ -16,10 +16,10 @@ enum ConvertPattern {
 }
 
 typedef ConvertCommand = {
-	var conv : Array<Convert>;
-	var ?params : Dynamic;
-	var ?paramsStr : String;
-	var ?then : ConvertCommand;
+	conv : Array<Convert>,
+	?params : Dynamic,
+	?paramsStr : String,
+	?then : ConvertCommand
 }
 
 class FileConverter {