Check if limit parameter is within a valid range
Check if offset parameter is not negative
Shift events pagination limit to 1000
Merge pull request #77 from cvut/paginaton_validation

Validate values for pagination
Add AssignPeople interactor.
Improve AssignPeople to refresh updated_at column for changed events.
Move people assignment to own rake task in event planning pipeline.
Refactor AssignPeople spec to use brackets with `expect (not_)to change` matcher.