Update to 1.18
Update DEPENDS

Upstream changes:
1.18  Thu Sep 19 14:24:00 2013
- No changes, code or otherwise, except for the version # in the *.pm, this file, and Changelog.ini.
- Somehow a corrupted version got uploaded to search.cpan.org, so I've just changed the version #.
The file on MetaCPAN was fine.
- Thanx to Rob (Sisyphus) for reporting this.

1.17  Mon Sep 16 15:24:00 2013
- Write test temp files in :raw mode as well as utf-8, for MS Windows users.
- Take the opportunity to change all utf8 to utf-8, as per the docs for Encode,
except for 'use warnings  qw(FATAL utf8);', which doesn't accept utf-8 :-(.

(wen)