Update test dependencies to latest versions

- MSTest 4.0.2 → 4.1.0
- coverlet.collector 6.0.4 → 8.0.0
- Verify.MSTest 31.9.3 → 31.13.2

Author: decriptor

Directory.Packages.props

@@ -11,7 +11,7 @@
     <PackageVersion Include="Nullable" Version="1.3.1" />
     <!-- Testing -->
     <PackageVersion Include="MSTest" Version="4.1.0" />
-    <PackageVersion Include="coverlet.collector" Version="6.0.4" />
-    <PackageVersion Include="Verify.MSTest" Version="31.12.5" />
+    <PackageVersion Include="coverlet.collector" Version="8.0.0" />
+    <PackageVersion Include="Verify.MSTest" Version="31.13.2" />
   </ItemGroup>
 </Project>