Merge pull request #142 from linked-data-dotnet/dependabot/nuget/support/1.x/coverlet.msbuild-3.1.2

Bump coverlet.msbuild from 2.9.0 to 3.1.2

Author: asbjornu

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

@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.msbuild" Version="2.9.0" />
+    <PackageReference Include="coverlet.msbuild" Version="3.1.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />