Fix nuget commandline reference

Author: jjw24

Flow.Launcher/Flow.Launcher.csproj

@@ -70,6 +70,10 @@
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="NHotkey.Wpf" Version="1.2.1" />
     <PackageReference Include="NLog.Web.AspNetCore" Version="4.9.0" />
+    <PackageReference Include="NuGet.CommandLine" Version="5.4.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="PropertyChanged.Fody" Version="2.5.13" />
     <PackageReference Include="System.Data.SQLite" Version="1.0.112" />
     <PackageReference Include="System.Data.SQLite.Core" Version="1.0.112" />

Scripts/post_build.ps1

@@ -125,6 +125,8 @@ function Main {
         Delete-Unused $p $config
         $o = "$p\Output\Packages"
         Validate-Directory $o
+        # making version static as multiple versions can exist in the nuget folder and in the case a breaking change is introduced.
+        New-Alias Nuget $env:USERPROFILE\.nuget\packages\NuGet.CommandLine\5.4.0\tools\NuGet.exe -Force
         Pack-Squirrel-Installer $p $v $o
 
         $isInCI = $env:APPVEYOR