V2.x - Nokogiri Upgrade Part 4 - Convert RubySaml::XML::Document to DocumentSigner #491

Job	Run time
rubocop	9s
Unit test (ubuntu-20.04, 3)	1m 45s
Unit test (ubuntu-20.04, jruby-9.4)	2m 30s
Unit test (ubuntu-20.04, 3.3)	1m 49s
Unit test (ubuntu-20.04, 3.1)	1m 49s
Unit test (ubuntu-20.04, 3.2)	1m 47s
Unit test (ubuntu-20.04, truffleruby)	3m 37s
Unit test (macos-latest, 3)	1m 34s
Unit test (macos-latest, 3.1)	1m 32s
Unit test (macos-latest, 3.2)	1m 38s
Unit test (ubuntu-20.04, 3.4)	1m 46s
Unit test (macos-latest, jruby-9.4)	2m 5s
Unit test (windows-latest, 3)	3m 11s
Unit test (windows-latest, 3.2)	2m 53s
Unit test (windows-latest, 3.4)	3m 8s
Unit test (windows-latest, 3.3)	3m 1s
Unit test (macos-latest, truffleruby)	2m 46s
Unit test (macos-latest, 3.4)	1m 36s
Unit test (windows-latest, 3.1)	3m 1s
Unit test (macos-latest, 3.3)	1m 32s
finish	-1s
	43m 8s

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