v3.0.0

Breaking changes

v3 removes external dependencies from the core TestStack.ConventionTest project.

1. Mono.Cecil is now ILMerged internally
   So if you use the Mono.Cecil functionality, leave it installed. Otherwise uninstall it to remove unneeded dependencies
2. ApprovalTests is no longer a dependency
   This also means the Convention.IsWithApprovedExeptions method is gone.
   Replace usage with var failures = Convention.GetFailures then use Shouldly's failures.ShouldMatchApproved() extension or ApprovalTests.Verify(failures) to verify the failures.