implement GameStateRepositoryTest
add lambda to the GameEventHandler.handle{} to set the version
add VersionBuilder
add version to the events
add creation date to the events
rename gameId to aggregateId
add EventHandler interface
implement GameStateRepositoryTest
add lambda to the GameEventHandler.handle{} to set the version
add VersionBuilder
add version to the events
add creation date to the events
rename gameId to aggregateId
add EventHandler interface