Update to 0.054
    
    - New upstream release 0.054
      - The 'is_file' method now does -e && ! -d and not -f because -f is often
        more restrictive than people intend or expect
      - Added 'chmod' method with symbolic chmod support ("a=r,u+rx")
      - The 'basename' method now takes a list of suffixes to remove before
        returning the name
      - Added FREEZE/THAW/TO_JSON serialization helpers
      - When constructing a Path::Tiny object from another, the original is
        returned unless it's a temp dir/file, which significantly speeds up calling
        path($path) if $path is already a Path::Tiny object
      - Constructing any path - e.g. with child() - with undef or zero-length
        parts throws an error instead of constructing an invalid path