Make ncrunch work again.

Avalonia.v3.ncrunchsolution

@@ -3,6 +3,7 @@
     <AdditionalFilesToIncludeForSolution>
       <Value>tests\TestFiles\**.*</Value>
       <Value>src\Avalonia.Build.Tasks\bin\Debug\netstandard2.0\Avalonia.Build.Tasks.dll</Value>
+      <Value>src\Avalonia.Build.Tasks\bin\Debug\netstandard2.0\Mono.Cecil.dll</Value>
     </AdditionalFilesToIncludeForSolution>
     <AllowParallelTestExecution>True</AllowParallelTestExecution>
     <ProjectConfigStoragePathRelativeToSolutionDir>.ncrunch</ProjectConfigStoragePathRelativeToSolutionDir>