Change default settings (v10)

[RicoSuter]

• Set TypeScriptVersion to 2.7

// DTO Properties

DateType = "System.DateTimeOffset";
DateTimeType = "System.DateTimeOffset";
TimeType = "System.TimeSpan";
TimeSpanType = "System.TimeSpan";

ArrayType = "System.Collections.Generic.ICollection";
DictionaryType = "System.Collections.Generic.IDictionary";

// DTO base types
ArrayBaseType = "System.Collections.Generic.Collection";
DictionaryBaseType = "System.Collections.Generic.Dictionary";

Tasks:

• Fix unit tests
• Remove this defaults from NSwag (because they are now set in NJS)