Adapt Godot 3.x defines

Author: ashtonmeuser

src/defs.h

@@ -44,11 +44,13 @@ Useful for minimizing changes to implementation files between targets e.g. GDExt
 #define FLOAT REAL
 #define RefCounted Reference
 #define PackedByteArray PoolByteArray
+#define PackedStringArray PoolStringArray
+#define PACKED_STRING_ARRAY POOL_STRING_ARRAY
 #define FAIL(message, ret) do { PRINT_ERROR(message); return ret; } while (0)
 #define FAIL_IF(cond, message, ret) if (unlikely(cond)) FAIL(message, ret)
 #define INSTANTIATE_REF(ref) ref.instance()
 #define BYTE_ARRAY_POINTER(array) array.read().ptr()
-#define PACKED_ARRAY_HAS(array, value) array.has(value)
+#define PACKED_ARRAY_HAS(array, value) array.read().ptr()->find(value) != -1
 #define CMDLINE_ARGS PoolStringArray() // User CLI args unsupported in Godot 3
 #define TIME_REALTIME OS::get_singleton()->get_system_time_msecs() * 1000000
 #define TIME_MONOTONIC OS::get_singleton()->get_ticks_usec() * 1000