Mutation bankruptcy on deprecations and temporary detectors

Not making long-term plans for this code thus not investing in mutant
coverage there.

Co-authored-by: Szymon Fiedler <[email protected]>
Co-authored-by: Mirosław Pragłowski <[email protected]>a

Author: mostlyobvious

ruby_event_store-active_record/.mutant.yml

@@ -30,3 +30,9 @@ matcher:
     - RubyEventStore::ActiveRecord::WithAbstractBaseClass#build_event_klass
     - RubyEventStore::ActiveRecord::WithAbstractBaseClass#build_stream_klass
     - RubyEventStore::ActiveRecord::Event.hook_attribute_type
+    - RubyEventStore::ActiveRecord::DoubleSerializationDetector
+    - RubyEventStore::ActiveRecord::EventRepositoryReader#initialize
+    - RubyEventStore::ActiveRecord::EventRepository#initialize
+    - RubyEventStore::ActiveRecord::EventRepository#json_data_type?
+    - RubyEventStore::ActiveRecord::DoubleSerializationDetector
+    - RubyEventStore::ActiveRecord::SkipJsonSerialization