build

Bump version to v2.3.1 #59

Job	Run time
build (gemfiles/Gemfile.rails-5.0, active_record)	2m 6s
build (gemfiles/Gemfile.rails-5.0, mongoid)	2m 27s
build (gemfiles/Gemfile.rails-5.0, dynamoid)	3m 27s
build (gemfiles/Gemfile.rails-5.1, active_record)	1m 56s
build (gemfiles/Gemfile.rails-5.1, mongoid)	2m 21s
build (gemfiles/Gemfile.rails-5.1, dynamoid)	2m 58s
build (gemfiles/Gemfile.rails-5.2, active_record)	2m 4s
build (gemfiles/Gemfile.rails-5.2, mongoid)	2m 27s
build (gemfiles/Gemfile.rails-5.2, dynamoid)	2m 46s
build (gemfiles/Gemfile.rails-6.0, active_record)	1m 46s
build (gemfiles/Gemfile.rails-6.0, mongoid)	2m 34s
build (gemfiles/Gemfile.rails-6.1, active_record)	1m 50s
build (gemfiles/Gemfile.rails-6.1, mongoid)	2m 15s
build (gemfiles/Gemfile.rails-7.0, active_record)	1m 31s
build (gemfiles/Gemfile.rails-7.0, mongoid)	1m 55s
build (gemfiles/Gemfile.rails-7.1, active_record)	1m 35s
build (gemfiles/Gemfile.rails-7.1, mongoid)	1m 57s
build (Gemfile, active_record, 3.3.3, mysql)	1m 55s
build (Gemfile, active_record, 3.3.3, postgresql)	1m 45s
build (Gemfile, mongoid, 3.3.3, mongodb)	2m 18s
build (Gemfile, active_record, head, true)	1m 5s
	44m 58s

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