4.2.0

This release introduces the following changes:

• 26 new providers were added to the OpenIddict.Client.WebIntegration package (that now offers a total of 45 OAuth 2.0/OpenID Connect integrations!):

Provider name
ArcGIS Online	Mailchimp
Asana	Patreon
Basecamp	QuickBooks Online
Battle.net	ServiceChannel
Bitbucket	Slack
DeviantArt	Smartsheet
Discord	Spotify
Dropbox	Strava
Epic Games	Streamlabs
Fitbit	SuperOffice
GitLab	Trovo
Harvest	Vimeo
HubSpot	Xero

• An issue affecting the OpenIddict.Validation.ServerIntegration package identified and reported by @SebastianStehle – who maintains the Squidex and Notifo projects – was fixed (see #1739 for more information). Thanks Sebastian! ❤️

• A new OpenIddictServerBuilder.SetIssuer() overload accepting a string instance was introduced to make the API consistent with the OpenIddictServerBuilder.Set*EndpointUris() methods.

• The OpenIddict.Client.SystemNetHttp and OpenIddict.Validation.SystemNetHttp packages now support JSON Structured Syntax Suffixes (defined in RFC6839) for increased interoperability.