Bump System.Threading.Tasks.Extensions from 4.5.3 to 4.5.4 in /src

Bumps [System.Threading.Tasks.Extensions](https://github.com/dotnet/corefx) from 4.5.3 to 4.5.4.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

Signed-off-by: dependabot[bot] <support@github.com>

src/Microsoft.VisualStudio.Threading.Analyzers.CodeFixes/Microsoft.VisualStudio.Threading.Analyzers.CodeFixes.csproj

@@ -37,7 +37,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis" Version="2.8.2" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.0.0" PrivateAssets="all" />
     <PackageReference Include="MicroBuild.VisualStudio" Version="$(MicroBuildVersion)" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>
 

src/Microsoft.VisualStudio.Threading.Analyzers/Microsoft.VisualStudio.Threading.Analyzers.csproj

@@ -33,7 +33,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="XliffTasks" Version="1.0.0-beta.19253.2" PrivateAssets="all" />
   </ItemGroup>

src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj

@@ -43,7 +43,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Roslyn.Diagnostics.Analyzers" Version="3.3.0-beta2.final" PrivateAssets="all" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0" />
     <PackageReference Include="Microsoft.VisualStudio.Validation" Version="15.5.31" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="4.7.0" />