tests

Bump nokogiri from 1.14.5 to 1.16.2 #57

Job	Run time
Tests (mysql, rails test test/unit)	21m 10s
Tests (mysql, rails test test/functional)	29m 42s
Tests (mysql, rails test test/integration)	15m 5s
Tests (mysql, rspec spec)	3m 23s
Tests (mysql, rake assets:precompile)	3m 33s
Tests (mysql, rake db:setup)	3m 30s
Tests (mysql, rake db:migrate)	3m 32s
Tests (mysql, rake seek:upgrade)	3m 5s
Tests (postgres, rails test test/unit)	20m 5s
Tests (sqlite3, rails test test/unit)	17m 43s
	2h 0m 48s

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