Move of preview System.Reactive.Linq (#22)

Author: Mpdreamz

tests/Directory.Build.props

@@ -1,7 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))"/>
-  <ItemGroup>
-    <PackageReference Include="Nullean.VsTest.Pretty.TestLogger" Version="0.10.0" PrivateAssets="All" />
-  </ItemGroup>
 </Project>

tests/Proc.Tests/Proc.Tests.csproj

@@ -17,13 +17,14 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Reactive.Linq" Version="4.0.0-preview00001" />
+    <PackageReference Include="System.Reactive.Linq" Version="4.4.1" />
     <PackageReference Include="FluentAssertions" Version="7.2.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageReference Include="Nullean.VsTest.Pretty.TestLogger" Version="0.10.0" PrivateAssets="All" />
   </ItemGroup>
 </Project>