Bumps nokogiri from 1.6.3.1 to 1.6.8.1. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md">nokogiri's changelog</a>.</em></p> <blockquote> <h2>1.6.8.1 / 2016-10-03</h2> <h3>Dependencies</h3> <p>Removes required dependency on the <code>pkg-config</code> gem. This dependency was introduced in v1.6.8 and, because it's distributed under LGPL, was objectionable to many Nokogiri users (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1488">#1488</a>, <a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1496">#1496</a>).</p> <p>This version makes <code>pkg-config</code> an optional dependency. If it's installed, it's used; but otherwise Nokogiri will attempt to work around its absence.</p> <h2>1.6.8 / 2016-06-06</h2> <h3>Security</h3> <p>[MRI] Bundled libxml2 is upgraded to 2.9.4, which fixes many security issues. Many of these had previously been patched in the vendored libxml 2.9.2 in the 1.6.7.x branch, but some are newer.</p> <p>See these libxml2 email posts for more:</p> <ul> <li><a href="https://mail.gnome.org/archives/xml/2015-November/msg00012.html">https://mail.gnome.org/archives/xml/2015-November/msg00012.html</a></li> <li><a href="https://mail.gnome.org/archives/xml/2016-May/msg00023.html">https://mail.gnome.org/archives/xml/2016-May/msg00023.html</a></li> </ul> <p>For a more detailed analysis, you may care to read Canonical's take on these security issues:</p> <ul> <li><a href="http://www.ubuntu.com/usn/usn-2994-1">http://www.ubuntu.com/usn/usn-2994-1</a></li> </ul> <p>[MRI] Bundled libxslt is upgraded to 1.1.29, which fixes a security issue as well as many long-known outstanding bugs, some features, some portability improvements, and general cleanup.</p> <p>See this libxslt email post for more:</p> <ul> <li><a href="https://mail.gnome.org/archives/xslt/2016-May/msg00004.html">https://mail.gnome.org/archives/xslt/2016-May/msg00004.html</a></li> </ul> <h3>Added</h3> <p>Several changes were made to improve performance:</p> <ul> <li>[MRI] Simplify <code>NodeSet#to_a</code> with a minor speed-up. (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1397">#1397</a>)</li> <li><code>XML::Node#ancestors</code> optimization. (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1297">#1297</a>) (Thanks, Bruno Sutic!)</li> <li>Use <code>Symbol#to_proc</code> where we weren't previously. (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1296">#1296</a>) (Thanks, Bruno Sutic!)</li> <li><code>XML::DTD#each</code> uses implicit block calls. (Thanks, <a href="https://github.com/glaucocustodio"><code>@​glaucocustodio</code></a>!)</li> <li>Fall back to the <code>pkg-config</code> gem if we're having trouble finding the system libxml2. This should help many FreeBSD users. (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1417">#1417</a>)</li> <li>Set document encoding appropriately even on blank document. (<a href="https://github-redirect.dependabot.com/sparklemotion/nokogiri/issues/1043">#1043</a>) (Thanks, <a href="https://github.com/batter"><code>@​batter</code></a>!)</li> </ul> <h3>Fixed</h3> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/sparklemotion/nokogiri/commit/002e4d8481dcc15bbf23fb385cdf5ebfed892442"><code>002e4d8</code></a> version bump to v1.6.8.1</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/3b9ee4baa2879be181227ee076cf54a062b93933"><code>3b9ee4b</code></a> update CHANGELOG for pkg-config</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/f2dd07910d2b8b332ce94f7daa4184532a0d8b4e"><code>f2dd079</code></a> Make the pkg-config gem optional.</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/6b05c5a5d319575f14d1cfc924c92f0df19a52cd"><code>6b05c5a</code></a> update v1.6.8 date in CHANGELOG</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/1103a647ee84837c6f23c4fe21e554bc2d3708bf"><code>1103a64</code></a> version bump to v1.6.8 final</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/03d402212707bd5dfa0a21b7de5e91a7f9d90028"><code>03d4022</code></a> update CHANGELOG with libxml2 USN info</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/a7da0f9217c7d00d9bd22be9948e73934ee55117"><code>a7da0f9</code></a> make sure test_all will errexit</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/8d4ea8671035a59d13936bce263cc7edb031fda0"><code>8d4ea86</code></a> make sure test_all doesn't require libxml-ruby</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/80e800bdb7ab5c04d19fcffdd6cc6c877b3f4279"><code>80e800b</code></a> use eval_gemfile to load libxml-ruby</li> <li><a href="https://github.com/sparklemotion/nokogiri/commit/95ba49addfb6dbece66127287d119b5955c4d28b"><code>95ba49a</code></a> test_all uses Bundler 1.12.*</li> <li>Additional commits viewable in <a href="https://github.com/sparklemotion/nokogiri/compare/v1.6.3.1...v1.6.8.1">compare view</a></li> </ul> </details> <br />

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