Bump NUnit3TestAdapter from 3.15.1 to 3.16.0 in /Source (#191)

Author: dependabot-preview[bot]

Source/GitReleaseManager.IntegrationTests/GitReleaseManager.IntegrationTests.csproj

@@ -15,7 +15,7 @@
     </ItemGroup>
     <ItemGroup>
         <PackageReference Include="nunit" Version="3.12.0" />
-        <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+        <PackageReference Include="NUnit3TestAdapter" Version="3.16.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
         <PackageReference Include="Serilog.Sinks.Console" Version="3.1.1" />
         <PackageReference Include="TextCopy" Version="1.7.1" />

Source/GitReleaseManager.Tests/GitReleaseManager.Tests.csproj

@@ -17,7 +17,7 @@
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
         <PackageReference Include="ApprovalTests" Version="4.4.0" />
         <PackageReference Include="NUnit" Version="3.12.0" />
-        <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+        <PackageReference Include="NUnit3TestAdapter" Version="3.16.0" />
         <PackageReference Include="Octokit" Version="0.36.0" />
     </ItemGroup>
 </Project>