V2.x - Nokogiri Upgrade Part 2 - Migrate some inner code to Nokogiri #492

Job	Run time
rubocop	12s
Unit test (ubuntu-20.04, 3.1)	1m 49s
Unit test (ubuntu-20.04, 3.2)	1m 46s
Unit test (ubuntu-20.04, 3)	1m 46s
Unit test (ubuntu-20.04, 3.3)	1m 39s
Unit test (macos-latest, 3)	1m 41s
Unit test (macos-latest, 3.3)	1m 37s
Unit test (macos-latest, 3.1)	1m 50s
Unit test (macos-latest, truffleruby)	2m 35s
Unit test (macos-latest, 3.2)	1m 36s
Unit test (macos-latest, 3.4)	1m 39s
Unit test (macos-latest, jruby-9.4)	2m 1s
Unit test (windows-latest, 3.2)	3m 20s
Unit test (ubuntu-20.04, 3.4)	1m 47s
Unit test (windows-latest, 3)	4m 29s
Unit test (ubuntu-20.04, jruby-9.4)	2m 31s
Unit test (ubuntu-20.04, truffleruby)	3m 37s
Unit test (windows-latest, 3.4)	4m 54s
Unit test (windows-latest, 3.1)	3m 15s
Unit test (windows-latest, 3.3)	3m 20s
finish	0s
	47m 24s

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