Pass a type instead of string to parser.addoption
Pass a type instead of string to parser.addoption

Otherwise we get this DeprecationWarning with pytest 3.0:

      [...]
      File ".../pytest_cov/plugin.py", line 72, in pytest_addoption
        help='Fail if the total coverage is less than MIN.')
      File ".../_pytest/config.py", line 482, in addoption
        self._anonymous.addoption(*opts, **attrs)
      File ".../_pytest/config.py", line 708, in addoption
        option = Argument(*optnames, **attrs)
      File ".../_pytest/config.py", line 609, in __init__
        stacklevel=3)
    DeprecationWarning: type argument to addoption() is a string 'int'. For parsearg this should be a type. (options: ('--cov-fail-under',))

pytest-dev/pytest-cov,schlamar/pytest-cov