Revert "Bump used activesupport version to newest one on ruby_event_store-rspec"
Revert "Bump used activesupport version to newest one on ruby_event_store-rspec"

This reverts commit 7c29018b76f2c5e76be3d033a7ad16d0c9bc1d6c.

RailsEventStore/rails_event_store,RailsEventStore/rails_event_store,RailsEventStore/rails_event_store,RailsEventStore/rails_event_store