Merge pull request #396 from json-api-dotnet/fix/#347

fix(#347): parallel tests were stomping each other

Author: jaredcnance

Diff for: test/UnitTests/UnitTests.csproj

@@ -14,4 +14,9 @@
     <PackageReference Include="Moq" Version="$(MoqVersion)" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="2.0.2" />
   </ItemGroup>
+  <ItemGroup>
+    <None Update="xunit.runner.json"> 
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> 
+    </None>
+  </ItemGroup>
 </Project>