build

Bump version to v2.3.1 #58

Job	Run time
build (gemfiles/Gemfile.rails-5.0, active_record)	2m 6s
build (gemfiles/Gemfile.rails-5.0, mongoid)	2m 16s
build (gemfiles/Gemfile.rails-5.0, dynamoid)	2m 52s
build (gemfiles/Gemfile.rails-5.1, active_record)	2m 0s
build (gemfiles/Gemfile.rails-5.1, mongoid)	2m 29s
build (gemfiles/Gemfile.rails-5.1, dynamoid)	3m 39s
build (gemfiles/Gemfile.rails-5.2, active_record)	1m 59s
build (gemfiles/Gemfile.rails-5.2, mongoid)	2m 37s
build (gemfiles/Gemfile.rails-5.2, dynamoid)	2m 55s
build (gemfiles/Gemfile.rails-6.0, active_record)	1m 59s
build (gemfiles/Gemfile.rails-6.0, mongoid)	2m 22s
build (gemfiles/Gemfile.rails-6.1, active_record)	1m 54s
build (gemfiles/Gemfile.rails-6.1, mongoid)	2m 19s
build (gemfiles/Gemfile.rails-7.0, active_record)	1m 37s
build (gemfiles/Gemfile.rails-7.0, mongoid)	1m 59s
build (gemfiles/Gemfile.rails-7.1, active_record)	1m 40s
build (gemfiles/Gemfile.rails-7.1, mongoid)	1m 55s
build (Gemfile, active_record, 3.3.3, mysql)	2m 7s
build (Gemfile, active_record, 3.3.3, postgresql)	1m 49s
build (Gemfile, mongoid, 3.3.3, mongodb)	2m 12s
build (Gemfile, active_record, head, true)	1m 4s
	45m 50s

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