When a commit is tagged more than once, we get an unhandled exception

[Marijn van der Zee]

Unhandled Exception: System.ArgumentException: An item with the same key has already been added.

ReleaseFinder.cs, line 13

You can expect a PR for this soon.

[Jake Ginnivan]

Thanks, I am really behind on this project. Will get back up to date on the weekend and merge/release if you submit one :)