Allow creation of backups without specifying 7z arguments

scripts/Windows/Scripts/Context.ps1

@@ -146,6 +146,10 @@ class Context {
         return $this.ArchivePath($softwareName);
     }
 
+    [void] Backup([string]$sourcePath, [string]$archivePath) {
+        $this.Backup($sourcePath, $archivePath, @());
+    }
+
     [void] Backup([string]$sourcePath, [string]$archivePath, [string[]]$arguments) {
         if (Test-Path $archivePath) {
             Remove-Item -Recurse $archivePath;