chore(deps): update dependency snapshooter.nunit to v0.12.0 (TestableIO#917)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj

@@ -21,6 +21,6 @@
     <PackageReference Include="Moq" Version="4.18.2" />
     <PackageReference Include="nunit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.3.0" />
-    <PackageReference Include="Snapshooter.NUnit" Version="0.11.1" />
+    <PackageReference Include="Snapshooter.NUnit" Version="0.12.0" />
   </ItemGroup>
 </Project>