Update to 2.15
    
    - New upstream release 2.15
      - Clean up the shambolic dates in the Changes file
      - Add a note under Caveats about setting options more that once - only the
        first case is respected (CPAN RT#69795)
      - Add a $encoding parameter to read_file() and write_file(), and add
        t/04.utf8.t and t/04.utf8.txt (CPAN RT#71029, CPAN RT#85571)
      - Fix temporary directory creation in tests for BSD-based systems
      - Rename t/*.t files
      - Add MANIFEST.SKIP, Changelog.ini, Build.PL, META.json
      - Add a FAQ to the docs
      - Clean up the docs
    - This release by RSAVAGE -> update source URL
    - Specify all dependencies
    - Drop support for old rpm versions as we need Path::Tiny, which is not
      available there