v0.10.642

• Breaking: Updated NuGet reference Newtonsoft.Json to v7.0.1
  (up from v6.0.8)
• Breaking: Remove the empty constructor from SingleValueObject<>
• New: Added SingleValueObjectConverter to help create clean JSON when
  e.g. domain events are serialized
• New: Added a protected method Register(IEventApplier) to
  AggregateRoot<,> that enables developers to override how events are
  applied. Use this to e.g. implement state objects
• New: Create AggregateState<,,> that developers can use to create aggregate
  state objects. Call Register(...) with the state object as argument
  to redirect events to it
• New: Allow AggregateRoot<,>.Apply(...), i.e., methods for applying events,
  to be private and protected
• New: Made AggregateRoot<,>.Emit(...) protected and virtual to allow
  overrides that e.g. add a standard set of metadata from the aggregate state.
• New: Made AggregateRoot<,>.ApplyEvent(...) protected and virtual to
  allow more custom implementations of applying events to the aggregate root.
• Fixed: Updated internal NuGet reference Dapper to v1.42 (up from v1.38)