Minor breaking change: The shim RequiresUnreferencedCodeAttribute has been changed from public to internal (#1462/#1463 - thanks @prochnowc!). This will only affect people targeting older/lower .NET standard frameworks who also rely on the shim attribute in Autofac. While it's technically breaking, it didn't seem like a great reason to do a full major release due to the edge case nature of the set of applications/users affected.