update post build script to use ppy.squirrel + latest nuget cmdline

Author: jjw24

Scripts/post_build.ps1

@@ -40,7 +40,7 @@ function Copy-Resources ($path, $config) {
     Copy-Item -Recurse -Force $path\Plugins\HelloWorldPython $target\Plugins\HelloWorldPython
     Copy-Item -Recurse -Force $path\JsonRPC $target\JsonRPC
     # making version static as multiple versions can exist in the nuget folder and in the case a breaking change is introduced.
-    Copy-Item -Force $env:USERPROFILE\.nuget\packages\squirrel.windows\1.5.2\tools\Squirrel.exe $output\Update.exe
+    Copy-Item -Force $env:USERPROFILE\.nuget\packages\ppy.squirrel.windows\1.9.0.4\tools\Squirrel.exe $output\Update.exe
 }
 
 function Delete-Unused ($path, $config) {
@@ -98,7 +98,7 @@ function Pack-Squirrel-Installer ($path, $version, $output) {
     $icon = "$path\Wox\Resources\app.ico"
     Write-Host "icon: $icon"
     # Squirrel.com: https://github.com/Squirrel/Squirrel.Windows/issues/369
-    New-Alias Squirrel $env:USERPROFILE\.nuget\packages\squirrel.windows\1.5.2\tools\Squirrel.exe -Force
+    New-Alias Squirrel $env:USERPROFILE\.nuget\packages\ppy.squirrel.windows\1.9.0.4\tools\Squirrel.exe -Force
     # why we need Write-Output: https://github.com/Squirrel/Squirrel.Windows/issues/489#issuecomment-156039327
     # directory of releaseDir in squirrel can't be same as directory ($nupkg) in releasify
     $temp = "$output\Temp"
@@ -126,7 +126,7 @@ function Main {
         $o = "$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\3.4.3\tools\NuGet.exe -Force
+        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