Update Win32 to CPAN version 0.48

  [DELTA]

0.48    [2013-11-20]
        - Typo fixes by David Steinbrunner.
        - Fix required perl version 5.6 -> 5.006.
        - Don't call note() in t/GetOSName.t when it has not been
          imported from Test::More.
        - Convert t/GetOSName.t to Unix line endings like the rest of
          this repo.