corrected typos

std/php/NativeArray.hx

@@ -1,5 +1,5 @@
 package php;
 
-extern class NativeArray implements ArrayAccess<Int> {
+extern class NativeArray implements ArrayAccess<Dynamic> {
 
 }

std/php/NativeString.hx

@@ -1,5 +1,5 @@
 package php;
 
-extern class NativeString implements ArrayAccess<Int> {
+extern class NativeString implements ArrayAccess<String> {
 
 }