fix conversion crash in iOS

-## 3.5.3
+## 3.5.4
 Bugs fixed:
 * Fixed a bug with an implicit conversion to integer for the scan timeout for iOS. (thanks @EArminjon !)
 

@@ -103,7 +103,7 @@ public class MobileScannerPlugin: NSObject, FlutterPlugin {
         let returnImage: Bool = (call.arguments as! Dictionary<String, Any?>)["returnImage"] as? Bool ?? false
         let speed: Int = (call.arguments as! Dictionary<String, Any?>)["speed"] as? Int ?? 0
         let timeoutMs: Int = (call.arguments as! Dictionary<String, Any?>)["timeout"] as? Int ?? 0
-        self.mobileScanner.timeoutSeconds = timeoutMs / Double(1000)
+        self.mobileScanner.timeoutSeconds = Double(timeoutMs) / Double(1000)
 
         let formatList = formats.map { format in return BarcodeFormat(rawValue: format)}
         var barcodeOptions: BarcodeScannerOptions? = nil

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'mobile_scanner'
-  s.version          = '3.5.3'
+  s.version          = '3.5.4'
   s.summary          = 'An universal scanner for Flutter based on MLKit.'
   s.description      = <<-DESC
 An universal scanner for Flutter based on MLKit.

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'mobile_scanner'
-  s.version          = '3.5.3'
+  s.version          = '3.5.4'
   s.summary          = 'An universal scanner for Flutter based on MLKit.'
   s.description      = <<-DESC
 An universal scanner for Flutter based on MLKit.

 name: mobile_scanner
 description: A universal barcode and QR code scanner for Flutter based on MLKit. Uses CameraX on Android, AVFoundation on iOS and Apple Vision & AVFoundation on macOS.
-version: 3.5.3
+version: 3.5.4
 repository: https://github.com/juliansteenbakker/mobile_scanner
 
 environment: