Adam Gauthier

For context, there is currently an issue where the metapackage is packed with dependencies of format `version-buildnumber` instead of the actual version of the pushed dependencies (`version-dev-buildnumber`). This leads to...

More discussion in #465 and on [stackoverflow](https://stackoverflow.com/questions/224155/when-clearing-an-observablecollection-there-are-no-items-in-e-olditems).

``` Caliburn.Micro.Core.Tests.EventAggregatorSubscribing.Caliburn.Micro.Core.Tests.EventAggregatorSubscribing.A_valid_subscriber_is_assigned_as_a_handler_its_message_type Assert.True() Failure Expected: True Actual: False ``` Not sure why that test is failing, everything is green locally. 🤔