v0.5.0

Features

• IHttpContextAccessor is no longer assumed to be included as part of AddIdentity(), we'll add it.
• Testing of dependency injection for web platforms (console apps coming soon).
• Switching to the use of IOptions<RollbarOptions> instead of IConfigurationRoot.
• Testing for SendMessage calls.
• Person record support (thank you mkdabrowski).
• Exception builder is now injectable.

Bug Fixes

• Sending a message to Rollbar no longer results in a null reference exception being thrown.