v0.12.891

• Breaking: Aggregate root no longer have Aggregate removed from their
  when name, i.e., the metadata property with key aggregate_name (or
  MetadataKeys.AggregateName). If you are dependent on the previous naming,
  use the new AggregateName attribute and apply it to your aggregates
• Breaking: Moved Identity<> and IIdentity from the EventFlow.Aggregates
  namespace to EventFlow.Core as the identities are not specific for aggregates
• Breaking: ICommand.Id is renamed to ICommand.AggregateId to make "room"
  for the new ICommand.SourceId property. If commands are serialized, then
  it might be important verify that the serialization still works. EventFlow
  does not serialize commands, so no mitigation is provided. If the
  Command<,> is used, make sure to use the correct protected constructor
• Breaking: IEventStore.StoreAsync(...) now requires an additional
  ISourceId argument. To create a random one, use SourceId.New, but it
  should be e.g. the command ID that resulted in the events. Note, this method
  isn't typically used by developers
• New: Added ICommand.SourceId, which contains the ID of the source. The
  default (if your commands inherit from Command<,>) will be a new
  CommandId each time the a Command<,> instance is created. You can pass
  specific value, merely use the newly added constructor taking the ID.
  Alternatively you commands could inherit from the new
  DistinctCommand, enabling commands with the same state to have the
  same SourceId
• New: Duplicate commands can be detected using the new ISourceId. Read the
  EventFlow article regarding commands for more details
• New: Aggregate names can now be configured using the attribute
  AggregateName. The name can be accessed using the new IAggregateRoot.Name
  property
• New: Added Identity<>.NewDeterministic(Guid, string) enabling creation of
  deterministic GUIDs
• New: Added new metadata key source_id (MetadataKeys.SourceId) containing
  the source ID, typically the ID of the command from which the event
  originated
• New: Added new metadata key event_id (MetadataKeys.EventId) containing a
  deterministic ID for the event. Events with the same aggregate sequence
  number and from aggregates with the same identity, will have the same event
  identity
• Fixed: Identity<>.With(string) now throws an ArgumentException instead of
  a TargetInvocationException when passed an invalid identity
• Fixed: Aggregate roots now build the cache of Apply methods once, instead
  of when the method is requested the first time