ODS export fails with undefined method `external_encoding' with nokogiri 1.14.0 and rubyzip 2.3.2

[dmolesUC]

Steps to reproduce:

1. With nokogiri 1.14.0 and rubyzip 2.3.2 installed, run the "ODS formats" tests in spec/berkeley_library/tind/export/export_spec.rb.

Expected:

• Tests pass.

Actual:

• Tests fail:

  NoMethodError: undefined method `external_encoding' for #<Zip::OutputStream:0x0000000158a99ff8>
  
    0) BerkeleyLibrary::TIND::Export export with results export ODS formats accepts BerkeleyLibrary::TIND::Export::ExportFormat::ODS as a format parameter
       Failure/Error: doc.write_to(out, encoding: ENCODING, save_with: 0)
  
       NoMethodError:
         undefined method `external_encoding' for #<Zip::OutputStream:0x0000000158a99ff8>
       # /Users/david/.rvm/gems/ruby-2.7.5/gems/nokogiri-1.14.0-arm64-darwin/lib/nokogiri/xml/node.rb:1368:in `native_write_to'
       # /Users/david/.rvm/gems/ruby-2.7.5/gems/nokogiri-1.14.0-arm64-darwin/lib/nokogiri/xml/node.rb:1368:in `write_to'
       # /Users/david/.rvm/gems/ruby-2.7.5/gems/nokogiri-1.14.0-arm64-darwin/lib/nokogiri/html5/node.rb:37:in `write_to'
       # ./lib/berkeley_library/util/ods/xml/document_node.rb:37:in `write_xml_to_stream'
       # ./lib/berkeley_library/util/ods/xml/document_node.rb:21:in `to_xml'
       # ./lib/berkeley_library/util/ods/spreadsheet.rb:157:in `write_zip_entry'
       # ./lib/berkeley_library/util/ods/spreadsheet.rb:147:in `block (2 levels) in write_zipfile'
       # ./lib/berkeley_library/util/ods/spreadsheet.rb:130:in `each_document'
       # ./lib/berkeley_library/util/ods/spreadsheet.rb:147:in `block in write_zipfile'
       # /Users/david/.rvm/gems/ruby-2.7.5/gems/rubyzip-2.3.2/lib/zip/output_stream.rb:63:in `write_buffer'
       # ./lib/berkeley_library/util/ods/spreadsheet.rb:146:in `write_zipfile'
  

[dmolesUC]

Probably related to sparklemotion/nokogiri@795464c. See sparklemotion/nokogiri#2773.