bpo-36974: tp_print -> tp_vectorcall_offset and tp_reserved -> tp_as_async (GH-13464)

Automatically replace
tp_print -> tp_vectorcall_offset
tp_compare -> tp_as_async
tp_reserved -> tp_as_async
diff --git a/Objects/iterobject.c b/Objects/iterobject.c
index 5bee1e2..da89298 100644
--- a/Objects/iterobject.c
+++ b/Objects/iterobject.c
@@ -144,10 +144,10 @@
     0,                                          /* tp_itemsize */
     /* methods */
     (destructor)iter_dealloc,                   /* tp_dealloc */
-    0,                                          /* tp_print */
+    0,                                          /* tp_vectorcall_offset */
     0,                                          /* tp_getattr */
     0,                                          /* tp_setattr */
-    0,                                          /* tp_reserved */
+    0,                                          /* tp_as_async */
     0,                                          /* tp_repr */
     0,                                          /* tp_as_number */
     0,                                          /* tp_as_sequence */
@@ -264,10 +264,10 @@
     0,                                          /* tp_itemsize */
     /* methods */
     (destructor)calliter_dealloc,               /* tp_dealloc */
-    0,                                          /* tp_print */
+    0,                                          /* tp_vectorcall_offset */
     0,                                          /* tp_getattr */
     0,                                          /* tp_setattr */
-    0,                                          /* tp_reserved */
+    0,                                          /* tp_as_async */
     0,                                          /* tp_repr */
     0,                                          /* tp_as_number */
     0,                                          /* tp_as_sequence */