v0.5.2

• New: Method to add repository to team - #546 via @kevfromireland
• Fixed: PATCH parameters for releases, issues and pull requests are now nullable - #561 via @thedillonb

Breaking Changes:

• PullRequestUpdate removed unused fields: Number, State, Base, and Head
• ReleaseClient.Create now accepts a NewRelease parameter (was ReleaseUpdate)
• ReleaseUpdate no longer requires a TagName in the constructor (see NewRelease)
• ReleaseUpdate now has nullable Draft and Prerelease properties - only
  set these if you want to apply changes to the API
• IssueUpdate.State is now a nullable ItemState
• MilestoneUpdate.Number is now removed
• MilestoneUpdate.State is now a nullable ItemState