[xiphos-source] [crosswire/xiphos] 81461b: Update dependencies (#871)

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/crosswire/xiphos
  Commit: 81461bab7cf12d3a96141529e81aba87a23534a0
      https://github.com/crosswire/xiphos/commit/81461bab7cf12d3a96141529e81aba87a23534a0
  Author: Greg Hellings <greg.hellings at gmail.com>
  Date:   2018-03-27 (Tue, 27 Mar 2018)

  Changed paths:
    M .travis.yml
    M wscript

  Log Message:
  -----------
  Update dependencies (#871)

Sword 1.8+ is now required
Fedora 26 will not ship 1.8
None of the Debian or Ubuntu-based distros currently ship Sword 1.8,
either