fs v1.2.3

Features

• Experimental support for / and + methods for fs_path objects (#110).

• file_create() and dir_create() now take ..., which is passed to
  path() to make construction a little nicer (#80).

Bugfixes

• path_ext(), path_ext_set() and path_ext_remove() now handle paths with
  directories including hidden files without extensions (#92).

• file_copy() now copies files into the directory if the target is a
  directory (#102).