Rollback Microsoft.Bcl.AsyncInterfaces to 6.0.0

This way we're consuming the same version of the dependency whether we're on .NET Framework or the .NET 6 runtime which we also target.

Also drop a couple of unnecessary dependencies from the Analyzers.Tests project.

Author: AArnott

.github/dependabot.yml

@@ -9,3 +9,4 @@ updates:
     interval: weekly
   ignore:
   - dependency-name: Microsoft.CodeAnalysis* # We intentionally target older VS versions.
+  - dependency-name: Microsoft.Bcl.AsyncInterfaces # We want to match the minimum target .NET runtime

Directory.Packages.props

@@ -12,7 +12,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="DNNE" Version="2.0.6" />
-    <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="7.0.0" />
+    <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="6.0.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis" Version="$(CodeAnalysisVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.3" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="$(CodeAnalysisVersion)" />
@@ -35,10 +35,8 @@
     <PackageVersion Include="Microsoft.Windows.CsWin32" Version="0.2.188-beta" />
     <PackageVersion Include="Nullable" Version="1.3.1" />
     <PackageVersion Include="System.Collections.Immutable" Version="6.0.0" />
-    <PackageVersion Include="System.Drawing.Common" Version="8.0.0" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
-    <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="7.0.0" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" />
     <PackageVersion Include="xunit.abstractions" Version="2.0.3" />

test/Microsoft.VisualStudio.Threading.Analyzers.Tests/Microsoft.VisualStudio.Threading.Analyzers.Tests.csproj

@@ -29,8 +29,6 @@
     <PackageReference Include="Microsoft.VisualStudio.Interop" />
     <PackageReference Include="Microsoft.VisualStudio.Shell.15.0" IncludeAssets="runtime" />
     <PackageReference Include="Microsoft.VisualStudio.Shell.Framework" IncludeAssets="runtime" />
-    <PackageReference Include="System.Drawing.Common" />
-    <PackageReference Include="System.Threading.Tasks.Dataflow" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio" />
     <PackageReference Include="Xunit.SkippableFact" />