2.19.0 changelog (#2863)

* 2.19.0 changelog

* Update changelog.md

changelog.md

@@ -1,3 +1,14 @@
+2.19.0
+=========
+- Updated to Microsoft.IdentityModel.* 7.6.0
+
+### New features
+- Id Web now provides a `.WithUser()` modifier to the Microsoft Graph queries (like `WithAppOnly()`). See issue [#2855](https://github.com/AzureAD/microsoft-identity-web/issues/2855) for details.
+- Id Web now provides a base class for implementing a custom `IAuthorizationHeaderProvider`. See issue [#2856](https://github.com/AzureAD/microsoft-identity-web/issues/2856) for details.
+
+### Bug fixes
+- Id Web now processes the extra query parameters when included as part of the authority. See issue [#2697](https://github.com/AzureAD/microsoft-identity-web/issues/2697) for details.
+
 2.18.2
 =========
 ### New feature