Log Message:
Update to 1.38

Upstream changes:
1.38  2018-12-13 16:26:00

      [BUGFIX]
      * require at least Cwd 3.75

1.35  2018-12-12 09:05:00

      [BUGFIX]
      * Tests failed

1.34  2018-12-11

      [BUGFIX]
      * Tests failed on Windows (github #9)
      * 'exclude' is meant to be a list of directories, but it was handled as \ 
regular expressions

      [IMPROVEMENTS]
      * rewrite larger parts of the module
      * add lots of tests