chore(main): release 6.1.0 (#369) #280

Job	Run time
build-matrix	14s
javers, gradle, postgresql-mvc-jwt	5m 59s
javers, maven, postgresql-mvc-jwt	5m 53s
custom, gradle, postgresql-mvc-jwt	6m 58s
custom, maven, postgresql-mvc-jwt	6m 10s
check-samples	3s
	25m 17s

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