ci: test with ruby 3.3, accommodate new libxml2 behavior

sparklemotion / mechanize

Mechanize is a ruby library that makes automated web interaction easy.

https://www.rubydoc.info/gems/mechanize/

MIT License

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Closed flavorjones closed 8 months ago

flavorjones commented 8 months ago

Add Ruby 3.3 to the test matrix.

Also, update an encoding test to pass with the latest libxml2 (v2.12) delivered by the latest nokogiri (v1.16).