Downgraded System.Threading.Tasks.Extensions to 4.5.2 due to loading error of Microsoft.Bcl.AsyncInterfaces.

Author: JoshClose

src/CsvHelper/CsvHelper.csproj

@@ -39,22 +39,22 @@
 	<!-- .NET 4.5 -->
 	<ItemGroup Condition="'$(TargetFramework)' == 'net45'">
 		<PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
-		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
 		<PackageReference Include="System.ValueTuple" Version="4.4.0" />
 	</ItemGroup>
 
 	<!-- .NET 4.7 -->
 	<ItemGroup Condition="'$(TargetFramework)' == 'net47'">
 		<PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.1.0" />
 		<PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
-		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
 	</ItemGroup>
 
 	<!-- .NET Standard 2.0 -->
 	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
 		<PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.1.0" />
 		<PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
-		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+		<PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
 	</ItemGroup>
 
 	<!-- .NET Standard 2.1 -->