add gems from standard lib to Gemfile [no issue] #2090

Job	Run time
GEMs caching	1m 1s
PqQ processors tests	1m 5s
Rubocop and bundle audit	1m 15s
Brakeman	52s
Check the consistency of the database constraints with the application validations	3m 37s
Rspec tests (6, 0)	17m 15s
Rspec tests (6, 1)	13m 40s
Rspec tests (6, 2)	18m 57s
Rspec tests (6, 3)	20m 32s
Rspec tests (6, 4)	10m 18s
Rspec tests (6, 5)	15m 59s
Coverage	48s
	1h 45m 19s

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