bpo-42519: Replace PyObject_MALLOC() with PyObject_Malloc() (GH-23587)

No longer use deprecated aliases to functions:

* Replace PyObject_MALLOC() with PyObject_Malloc()
* Replace PyObject_REALLOC() with PyObject_Realloc()
* Replace PyObject_FREE() with PyObject_Free()
* Replace PyObject_Del() with PyObject_Free()
* Replace PyObject_DEL() with PyObject_Free()
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index ee1a9d1..7a37313 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -269,7 +269,7 @@ _PyDict_ClearFreeList(PyThreadState *tstate)
         PyObject_GC_Del(op);
     }
     while (state->keys_numfree) {
-        PyObject_FREE(state->keys_free_list[--state->keys_numfree]);
+        PyObject_Free(state->keys_free_list[--state->keys_numfree]);
     }
 }
 
@@ -597,7 +597,7 @@ new_keys_object(Py_ssize_t size)
     }
     else
     {
-        dk = PyObject_MALLOC(sizeof(PyDictKeysObject)
+        dk = PyObject_Malloc(sizeof(PyDictKeysObject)
                              + es * size
                              + sizeof(PyDictKeyEntry) * usable);
         if (dk == NULL) {
@@ -636,7 +636,7 @@ free_keys_object(PyDictKeysObject *keys)
         state->keys_free_list[state->keys_numfree++] = keys;
         return;
     }
-    PyObject_FREE(keys);
+    PyObject_Free(keys);
 }
 
 #define new_values(size) PyMem_NEW(PyObject *, size)
@@ -1303,7 +1303,7 @@ dictresize(PyDictObject *mp, Py_ssize_t newsize)
             state->keys_free_list[state->keys_numfree++] = oldkeys;
         }
         else {
-            PyObject_FREE(oldkeys);
+            PyObject_Free(oldkeys);
         }
     }