Unexpected handling of empty array when link-ing using AR repo

[mpokrywka]

While using InMemoryRepository, client.link([], stream_name: "test") works as expected:
RubyEventStore::Client.new(repository:RubyEventStore::InMemoryRepository.new).link([],stream_name:"Test")

but when using RailsEventStoreActiveRecord::EventRepository, client.link([], stream_name: "test") raises exception.
RubyEventStore::Client.new(repository:RailsEventStoreActiveRecord::EventRepository.new(serializer:RubyEventStore::NULL)).link([],stream_name:"Test")

Same for nil parameter - works with InMemoryRepo.

Probably RailsEventStoreActiveRecord::EventRepository#link_to_stream should check for empty event_ids similar like in "append_to_stream"

[mpokrywka]

Change of behavior happened after Replace ActiveRecord::Import#import for Rails 6 bulk insert

[mostlyobvious]

Definitely missed change, thank for pointing this out!