Merge pull request #49 from linked-data-dotnet/dependabot/nuget/coverlet.msbuild-2.8.1

Bump coverlet.msbuild from 2.3.1 to 2.8.1

Author: asbjornu

test/json-ld.net.tests/json-ld.net.tests.csproj

@@ -20,7 +20,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.msbuild" Version="2.3.1" />
+    <PackageReference Include="coverlet.msbuild" Version="2.8.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />