nokogiri 1.8.4 is incompatible

[patricklee2]

ruby-docs-hello-world/Gemfile.lock

Line 87 in 8efd5fc

nokogiri (1.8.4-x64-mingw32)

https://nokogiri.org/CHANGELOG.html#bug-fixes_4

[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]

Kudu is unable to install nokogiri 1.8.4

Please update nokogiri