[ANN] diff-lcs 1.3 Released

diff-lcs version 1.3 has been released!

* home: <https://github.com/halostatue/diff-lcs>
* code: <https://github.com/halostatue/diff-lcs>
* bugs: <https://github.com/halostatue/diff-lcs/issues>
* rdoc: <http://rubydoc.info/github/halostatue/diff-lcs>
* continuous integration: <{img src="https://travis-ci.org/halostatue/diff-lcs.svg" /}[https://travis-ci.org/halostatue/diff-lcs]>
* test coverage: <{img src="https://coveralls.io/repos/halostatue/diff-lcs/badge.svg" alt="Coverage Status" /}[https://coveralls.io/r/halostatue/diff-lcs]>

Diff::LCS computes the difference between two Enumerable sequences using the
McIlroy-Hunt longest common subsequence (LCS) algorithm. It includes utilities
to create a simple HTML diff output format and a standard diff-like tool.

This is release 1.3, providing a tentative fix to a long-standing issue related
to incorrect detection of a patch direction. Also modernizes the gem
infrastructure, testing infrastructure, and provides a warning-free experience
to Ruby 2.4 users.

Changes:

## 1.3 / 2017-01-18

* Bugs fixed:

    * Fixed an error for bin/ldiff --version. Fixes [issue #21][].
    * Force Diff::LCS::Change and Diff::LCS::ContextChange to only perform
        equality comparisons against themselves. Provided by Kevin Mook in
        [pull request #29][].
    * Fix tab expansion in htmldiff, provided by Mark Friedgan in
        [pull request #25][].
    * Silence Ruby 2.4 Fixnum deprecation warnings. Fixxues [issue #38][] and
        [pull request#36][].
    * Ensure that test dependencies are loaded properly. Fixes [issue #33][]
        and [pull request #34][].
    * Fix [issue #1][] with incorrect intuition of patch direction. Tentative
        fix, but the previous failure cases pass now.

* Tooling changes:

    * Added SimpleCov and Coveralls support.
    * Change the homepage (temporarily) to the GitHub repo.
    * Updated testing and gem infrastructure.
    * Modernized the specs.

* Cleaned up documentation.

* Added a Code of Conduct.