Fixed vulnerabilities by removing all System.* 4 versions as recommended by Microsoft (https://devblogs.microsoft.com/nuget/nugetaudit-2-0-elevating-security-and-trust-in-package-management/#system-net-http-and-system-text-regularexpressions

Related issue: #544

Author: ckadluba

Directory.Packages.props

@@ -5,12 +5,6 @@
   <ItemGroup>
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageVersion Include="System.Configuration.ConfigurationManager" Version="6.0.1" />
-    <PackageVersion Include="System.Collections" Version="4.3.0" />
-    <PackageVersion Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
-    <PackageVersion Include="System.Resources.ResourceManager" Version="4.3.0" />
-    <PackageVersion Include="System.Runtime.Extensions" Version="4.3.1" />
-    <PackageVersion Include="System.Runtime.InteropServices" Version="4.3.0" />
-    <PackageVersion Include="System.Text.Encoding.Extensions" Version="4.3.0" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="5.1.6" />
     <PackageVersion Include="Microsoft.Extensions.Configuration" Version="6.0.1" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0" />

test/Serilog.Sinks.MSSqlServer.Tests/Serilog.Sinks.MSSqlServer.Tests.csproj

@@ -38,21 +38,13 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net472' Or '$(TargetFramework)' == 'net462' ">
-    <Reference Include="System" />
-    <Reference Include="System.Transactions" />
     <Reference Include="Microsoft.CSharp" />
     <Compile Include="Configuration\Extensions\Hybrid\**\*.cs" />
     <Compile Include="Configuration\Implementations\Microsoft.Extensions.Configuration\**\*.cs" />
     <Compile Include="Configuration\Implementations\System.Configuration\**\*.cs" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
-    <PackageReference Include="System.Collections" />
-    <PackageReference Include="System.Runtime.InteropServices" />
-    <PackageReference Include="System.Runtime.Extensions" />
-    <PackageReference Include="System.IO.FileSystem.Primitives" />
-    <PackageReference Include="System.Resources.ResourceManager" />
-    <PackageReference Include="System.Text.Encoding.Extensions" />
     <PackageReference Include="coverlet.collector">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>