test: adjust tests to pass on system libxml2 >= 2.9.11, and work around windows dll unloading issue #2240
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What problem is this PR intended to solve?
Adjust tests to pass on system libxml2 >= 2.9.11, because the comment parsing improvement was merged upstream. See https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/82 for context (and the recently removed
htmlParseComment
patch). This will allow us to run tests regularly against upstream master.Also, work around the libxml2 issue described in #2241 by having libxml2 use its default memory management on windows when system libraries are being used. Note that this also introduces a new value into
Nokogiri::VERSION_INFO
, which is "libxml → memory_management", and the value will be either "ruby" or "default".