Add IsTestProject property

Author: Michael Ganss

SyncChanges.Tests/SyncChanges.Tests.csproj

@@ -2,6 +2,7 @@
   <PropertyGroup>
     <TargetFramework>net461</TargetFramework>
     <SonarQubeExclude>true</SonarQubeExclude>
+    <IsTestProject>true</IsTestProject>
   </PropertyGroup>
   <ItemGroup>
     <Folder Include="Properties\" />
@@ -12,7 +13,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="NPoco" Version="4.0.1" />
-    <PackageReference Include="NUnit" Version="3.10.1" />
+    <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
   </ItemGroup>
   <ItemGroup>