feat: Allow specifying a specific version in install script

Author: lazysegtree

website/public/install.ps1

@@ -22,7 +22,7 @@ Write-Host -ForegroundColor Red         "                    `$`$/
 Write-Host ""
 
 $package = "superfile"
-$version = "1.3.0"
+$version = if ($env:SPF_INSTALL_VERSION) { $env:SPF_INSTALL_VERSION } else { "1.3.0" }
 
 $installInstructions = @'
 This installer is only available for Windows.

website/public/install.sh

@@ -39,7 +39,7 @@ if [ $? -ne 0 ]; then
 fi
 
 package=superfile
-version=1.3.0
+version=${SPF_INSTALL_VERSION:-1.3.0}
 arch=$(uname -m)
 os=$(uname -s)
 

website/public/uninstall.ps1

@@ -22,7 +22,6 @@ Write-Host -ForegroundColor Red         "                    `$`$/
 Write-Host ""
 
 $package = "superfile"
-$version = "1.3.0"
 
 $installInstructions = @'
 This uninstaller is only available for Windows.