[ANN] nokogiri security update 1.8.2 released

nokogiri version 1.8.2 has been released.

This release contains a few new features and bugfixes in addition to the
security update, wherein the vendored libxml2 and libxslt versions have
been updated:

* libxml2 is updated from 2.9.5 to 2.9.7

* libxslt is updated from 1.1.30 to 1.1.32

which addresses at least one published vulnerability, [CVE-2017-15412][],
which rates a "priority:medium" from Canonical. Github Issue [#1714][] has
more information on this CVE.

If you're using your distro's system libraries, rather than Nokogiri's
vendored libraries, there's no security need to upgrade at this time. Full
details about the security update are available in Github Issue [#1714][].

One other notable change in this version is support for Ruby 2.5 on Windows
in the "fat binary" gems. Special thanks goes to Lars Kanis for his
continuing work to help support Windows users.

  [CVE-2017-15412]:
https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-15412.html
  [#1714]: https://github.com/sparklemotion/nokogiri/issues/1714

···

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Full changelog entry:

# 1.8.2 / 2018-01-29

## Security Notes

[MRI] The update of vendored libxml2 from 2.9.5 to 2.9.7 addresses at least
one published vulnerability, CVE-2017-15412. [#1714 has complete details]

## Dependencies

* [MRI] libxml2 is updated from 2.9.5 to 2.9.7
* [MRI] libxml2 is updated from 1.1.30 to 1.1.32

## Features

* [MRI] OpenBSD installation should be a bit easier now. [#1685] (Thanks,
@jeremyevans!)
* [MRI] Cross-built Windows gems now support Ruby 2.5

## Bug fixes

* Node#serialize once again returns UTF-8-encoded strings. [#1659]
* [JRuby] made SAX parsing of characters consistent with C implementation
[#1676] (Thanks, @andrew-aladev!)
* [MRI] Predefined entities, when inspected, no longer cause a segfault.
[#1238]

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