fix demo & preview urls

Author: ren6

ApphudSDK.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'ApphudSDK'
-  s.version          = '4.0.0-beta3'
+  s.version          = '4.0.0-beta4'
   s.summary          = 'Build and Measure In-App Subscriptions on iOS.'
   s.description      = 'Apphud covers every aspect when it comes to In-App Subscriptions from integration to analytics on iOS and Android.'
   s.homepage         = 'https://github.com/apphud/ApphudSDK'

Sources/ApphudUI/ApphudView.swift

@@ -66,7 +66,9 @@ internal class ApphudView: WKWebView {
 
     public func replaceProductsInfo(infos: [[String: any Sendable]]) {
 
-        if ((self.url?.absoluteString.contains("demo=true")) != nil && (self.url?.absoluteString.contains("preview=true")) != nil) {
+        let urlString = self.url?.absoluteString ?? ""
+        
+        if (urlString.contains("demo=true") && urlString.contains("preview=true")) {
             self.viewDelegate?.apphudViewDidExecuteJS(error: nil)
             return
         }