Bump coverlet.collector and Microsoft.NETFramework.ReferenceAssemblies (#228)

Author: dependabot[bot]

src/AsyncAwaitBestPractices.UnitTests/AsyncAwaitBestPractices.UnitTests.csproj

@@ -16,7 +16,7 @@
         </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
         <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" PrivateAssets="All" />
-        <PackageReference Include="coverlet.collector" Version="6.0.3" PrivateAssets="All" />
+        <PackageReference Include="coverlet.collector" Version="6.0.4" PrivateAssets="All" />
     </ItemGroup>
     <ItemGroup>
         <ProjectReference Include="..\AsyncAwaitBestPractices.MVVM\AsyncAwaitBestPractices.MVVM.csproj" />