[MacPorts] #53596: py-mock @1.0.1_0: upgrade to 2.0.0

[MacPorts]

#53596: py-mock @1.0.1_0: upgrade to 2.0.0
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 Reporter:  JDLH    |      Owner:
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-mock
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 Port py-mock is at @1.0.1_0. Current version is 2.0.0 per
 https://pypi.python.org/pypi/mock/ 1.0.1 dates back to July 2015, and
 2.0.0 became current in April 2016, per https://github.com/testing-
 cabal/mock/releases.

 However, this module is distributed with the Python standard library as
 `unittest.mock` starting with Python 3.3, per
 https://docs.python.org/dev/library/unittest.mock.html . So, I suppose the
 purpose of py-mock is to provide back-ports to Python3 before 3.3 and to
 Python 2.7.

 I am not able to come up with an updated Portfile on my own right now.

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Ticket URL: <https://trac.macports.org/ticket/53596>
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