fix build error

test/DotNetCore.CAP.Test/DotNetCore.CAP.Test.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
@@ -9,12 +9,10 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="3.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="3.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
-    </PackageReference>
-    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="xunit" Version="2.4.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
+    <PackageReference Include="coverlet.collector" Version="1.0.1" />
     <PackageReference Include="Moq" Version="4.10.1" />
   </ItemGroup>