Add Options.Default, Split autoUnion option
Fast-follow release with breaking changes vs 2.3.1, which (along with 2.3.0) is unlisted
Added
SystemTextJson: AddOptions.Defaultto matchJsonSerializerSettings.Default#73
Changed
SystemTextJson: ReplaceautoUnion=truewith individually controllableautoTypeSafeEnumToJsonStringandautoUnionToJsonObjectsettings re #71 #73
See CHANGELOG