* Add release notes and bump version to 0.24
* run "build FormatCode" to fix up whitespace/formatting issues
* Fix failing Ssh key tests due to "validation exception". This key must be in use on github (under another user, most likely from these tests failing). Changed to a new SSH key and tweaked tests to reduce chance of a key being created and not destroyed
* Assignee and Assignees cant both be specified on NewIssue. We missed this one in the PR. Marked Assignee as [Obsolete] and fixed tests to use Assignees
* Fix a couple of Reactions tests that were calling the wrong client methods
* Fix timeline tests - looks like the response class has changed shape a bit, it now has an Issue object in the payload and Id field isnt present (leaving Id field there in case other timeline events do use it)
* Fix some following tests that require the test user to follow more than 1 other user
* Unskip these Event tests now because apparently they work!
* add breaking changes notes
* Update ApiErrorMessageSafe to return null for empty and whitespace strings (#1540)
* return null if ApiError.Message is empty or whitespace
* Uncomment test, which now passes
* update release notes to include PR1540
* Add "Bot" AccountType, was causing a deserialization exception when running the integration test "SearchForExcludedLanguage" (#1541)
* Update to include PR1541
* add bullets to make release notes easier to read
* markup additional code mentions in notes
* Fix grammar
fields => field
* Implement Issue Timeline preview API
* Add DebuggerDisplay to response models
* Rename method
* Add Observable Issue Timeline client
* Add that missing property thing
* Add teh comments
* Added unit tests
* Fix method names
* Add missing event type enum and API preview accept header
* Add integration tests for async client
* Pass in API preview header
* Add observable integration tests
* Unbreak the broken tests...
* Remove unnecessary usings
* Add missing events
* Fix API URLs
* Add overloads for using repository Id instead of owner/repo and paging
* Add tests for repository id overloads
* Add paging tests
* I'm clearly a bit rusty about this test thing here...
* Missed a check for null argument
* Added missing XMLDocs
