Bump nokogiri from 1.8.4 to 1.8.5 in /docs

[dependabot[bot]]

Bumps nokogiri from 1.8.4 to 1.8.5.

Changelog

Sourced from nokogiri's changelog.

1.8.5 / 2018-10-04

Security

[MRI] Pulled in upstream patches from libxml2 that address CVE-2018-14404 and CVE-2018-14567. Full details are available in #1785. Note that these patches are not yet (as of 2018-10-04) in an upstream release of libxml2.

Fixed

• [MRI] Fix regression in installation when building against system libraries, where some systems would not be able to find libxml2 or libxslt when present. (Regression introduced in v1.8.3.) [#1722]
• [JRuby] Fix node reparenting when the destination doc is empty. [#1773]

Commits

• e28fa4b version bump to v1.8.5
• 712edef update changelog
• 7feb4c1 Merge branch 'fix-1773'
• 7cc6cf6 Organize imports in XmlNode.java.
• 1697442 Allow reparenting nodes to be a child of an empty document.
• 7b8cd0f Merge pull request #1786 from sparklemotion/1785-canonical-usns
• 5bff4bb pull in upstream libxml2 patches
• c232226 changelog
• 862b88f changelog
• b3750eb remove -Wextra CFLAG
• Additional commits viewable in compare view

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