s/iteritems/items/g (#330)

Author: methane

msgpack/_packer.pyx

@@ -226,7 +226,7 @@ cdef class Packer(object):
                     raise ValueError("dict is too large")
                 ret = msgpack_pack_map(&self.pk, L)
                 if ret == 0:
-                    for k, v in d.iteritems():
+                    for k, v in d.items():
                         ret = self._pack(k, nest_limit-1)
                         if ret != 0: break
                         ret = self._pack(v, nest_limit-1)