[execnet-dev] release of execnet 1.4.1 to fix the serializer regression

[Ronny Pfannschmidt]

Hi,

unfortunately there was a serializer regression in execnet 1.4 due to
the implied order of the opcodes

i created a unittest for them and restored the original order

-- ronny

changelog:

1.4.1
------

- fix a regression of the Serializer created by the implied opcode ordering
  which resulted in a incompatible opcode mapping

  *warning* stored serialized objects created with 1.4.0 are incompatible
  with previous versions and future versions
  additionally stored serialized objects containing complex objects will
  have a incompatible opcode when read with execnet < 1.4.0
  and wont be loadable with execnet 1.4.0 either

  its strongly suggested to avoid using the Serializer of execnet 1.4.0
  this affects devpi and the external pytest-cache plugin