Bump NLog.Extensions.Logging in /tests/NLog.Web.AspNetCore.Tests (#455)

Bumps [NLog.Extensions.Logging](https://github.com/NLog/NLog.Extensions.Logging) from 1.5.2 to 1.5.3.
- [Release notes](https://github.com/NLog/NLog.Extensions.Logging/releases)
- [Changelog](https://github.com/NLog/NLog.Extensions.Logging/blob/master/CHANGELOG.MD)
- [Commits](https://github.com/NLog/NLog.Extensions.Logging/commits)

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

src/NLog.Web.AspNetCore/NLog.Web.AspNetCore.csproj

@@ -57,7 +57,7 @@ Supported platforms:
     <DefineConstants>$(DefineConstants);ASP_NET_CORE;ASP_NET_CORE2</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="NLog.Extensions.Logging" Version="1.5.2" />
+    <PackageReference Include="NLog.Extensions.Logging" Version="1.5.3" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'net451' ">
     <Reference Include="System" />