Incorporate serializer_id added in 1.3.1 into main SQL DDL
Incorporate serializer_id added in 1.3.1 into main SQL DDL

The content for the `CREATE TABLE` statements hasn't been updated for 1.3.1, and it isn't clear that one must apply the 1.1.0 to 1.3.1 migration after executing the main script.  This commit brings the main SQL script up to 1.3.1 so that when executed, no additional migration is necessary.
akkadotnet/Akka.Persistence.PostgreSql,Aaronontheweb/Akka.Persistence.PostgreSql,Aaronontheweb/Akka.Persistence.PostgreSql,akkadotnet/Akka.Persistence.PostgreSql