7.0.0-preview2

7.0.0-preview2

Performance improvements:

• Series of perf improvements in collaboration with ASP .NET Core DevDiv team, results in improvements from 280K Request per second (RPS) in 7.0.0-preview to 370K RPS in 7.0.0-preview2, with more improvements to come in later versions: #2195, #2194, #2193, #2192, #2190, #2188, #2184, #2181, #2180, #2178, #2175, #2172, #2171, #2170, #2169, #2168, #2167, #2166, #2164, #2162, #2161, #2160, #2159, #2158, #2221

• First increment in replacing newtonsoft with System.Text.Json, see #2174

• Reading and writing JsonWebKey and JsonWebKeySet types now use System.Text.Json.Utf8JsonReaders/Writers for serialization. Seee PR @2208 for details.

• Remove the use of Newtonsoft from OpenIdConnectConfiguration and OpenIdConnectMessage. See PR @2214 for details.

Engineering excellence:

• Fix casing Properties directory in updateAssemblyInfo.ps1 script see,
  #2189

• Add code coverage in ADO, see #2176

• Add codeQL scanning for compliance, see #2151

• Start adding support for Nullables, see #2139 and #2203.