serilog-sinks-http: Incompatibility with asp.net core 2.x

Describe the bug

1. Serilog.Sinks.Http 7.2.0/8.0.0-beta.7 both can’t be installed to asp.net core 2.x on dotnet 2.x project with error message:

Severity	Code	Description	Project	File	Line	Suppression State
Error	NU1107	Version conflict detected for Microsoft.Extensions.Configuration. Install/reference Microsoft.Extensions.Configuration 3.1.9 directly to project netcore21aspnetcore to resolve this issue. 
 netcore21aspnetcore -> Serilog.Sinks.Http 7.2.0 -> Microsoft.Extensions.Configuration (>= 3.1.9) 
 netcore21aspnetcore -> Microsoft.AspNetCore.App 2.1.1 -> Microsoft.Extensions.Configuration (>= 2.1.1 && < 2.2.0).	netcore21aspnetcore	C:\Users\user\RiderProjects\ComatCheck\netcore21aspnetcore\netcore21aspnetcore.csproj	1	

1. Serilog.Sinks.Http 8.0.0-beta.7 with asp.net core 2.x on net46+ project causes runtime exception during start:

System.TypeLoadException: Could not load type 'Microsoft.Extensions.Primitives.InplaceStringBuilder' from assembly 'Microsoft.Extensions.Primitives, Version=5.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.
   at Microsoft.Net.Http.Headers.DateTimeFormatter.ToRfc1123String(DateTimeOffset dateTime, Boolean quoted)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.DateHeaderValueManager.SetDateValues(DateTimeOffset value)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.DateHeaderValueManager.OnHeartbeat(DateTimeOffset now)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure.Heartbeat.OnHeartbeat()

(Additional context - https://github.com/dotnet/aspnetcore/issues/27986)

. To Reproduce First case:

dotnet new webapp --framework netcoreapp2.1 -o superproj
cd  superproj
dotnet add package serilog.sinks.http

Second case: Visual Studo => New Project => ASP.NET Core Web App => “Run on .NET Framework” checkbox => Add “Serilog.Sinks.Http 8.0.0-beta.7” => Run project

Reason Reason for both cases- too high lower version of Microsoft.Extensions.Configuration.