Merge pull request #3072 from wqyfavor/modify-ios-version

Upgrade readme for iOS minimum supported version.
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
index 4c95e51..2ac96a4 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
@@ -135,6 +135,13 @@
     _embedInstance.pageObject = self.weexInstance.viewController;
     _embedInstance.viewController = self.weexInstance.viewController;
     
+    if (self.invertForDarkScheme) {
+        [_embedInstance setAutoInvertingBehavior:WXAutoInvertingBehaviorAlways];
+    }
+    else {
+        [_embedInstance setAutoInvertingBehavior:WXAutoInvertingBehaviorNever];
+    }
+    
     NSString *newURL = nil;
     
     if ([sourceURL.absoluteString rangeOfString:@"?"].location != NSNotFound) {