fix(iOS): add basicAuthCredential prop

apple/RNCWebView.h

 @property (nonatomic, copy) NSString * _Nullable allowingReadAccessToURL;
 @property (nonatomic, assign) BOOL pullToRefreshEnabled;
 @property (nonatomic, weak) UIRefreshControl * refreshControl;
+@property (nonatomic, copy) NSDictionary * _Nullable basicAuthCredential;
 
 #if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000 /* iOS 13 */
 @property (nonatomic, assign) WKContentMode contentMode;

apple/RNCWebView.m

             }
         }
     }
+    if ([[challenge protectionSpace] authenticationMethod] == NSURLAuthenticationMethodHTTPBasic) {
+        NSString *username = [_basicAuthCredential valueForKey:@"username"];
+        NSString *password = [_basicAuthCredential valueForKey:@"password"];
+        if (username && password) {
+            NSURLCredential *credential = [NSURLCredential credentialWithUser:username password:password persistence:NSURLCredentialPersistenceNone];
+            completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
+            return;
+        }
+    }
     completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
 }
 

apple/RNCWebViewManager.m

 RCT_EXPORT_VIEW_PROPERTY(cacheEnabled, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(allowsLinkPreview, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(allowingReadAccessToURL, NSString)
+RCT_EXPORT_VIEW_PROPERTY(basicAuthCredential, NSDictionary)
 
 #if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
 RCT_EXPORT_VIEW_PROPERTY(contentInsetAdjustmentBehavior, UIScrollViewContentInsetAdjustmentBehavior)