Prep for 6.1.4 release

Upgrade swagger-ui to 3.47.1 + prep for next release

Update readme for 6.1.2 release

Fix issue domaindrivendev#2057 related to readonly properties set via…

… constructor

Support DefaultValueAttribute on parameter-based schemas

Support multiple instances of Swagger middleware with scoped options

Prep for 6.0.6 release

Fix invalid compiler conditionals that were introduced with explicit …

…net5.0 targeting

Merge pull request domaindrivendev#2002 from domaindrivendev/explicit…

…-net5-targeting

Target net5.0 explicitly for all projects

Defer sorting of schemas via SortedDictionary until after doc filters