Apply suggestions from code review

Co-authored-by: Jax DesMarais-Leder <jdesmarais@paypal.com>

Author: jaxdesmarais

Sources/PopupBridge/POPPopupBridge.swift

@@ -91,9 +91,9 @@ public class POPPopupBridge: NSObject, WKScriptMessageHandler {
         prefersEphemeralWebBrowserSession: Bool = true
     ) {
         self.webView = webView
+        self.webAuthenticationSession = webAuthenticationSession
         self.returnURLScheme = returnURLScheme
         self.application = application
-        self.webAuthenticationSession = webAuthenticationSession
 
         super.init()