fix: ios layout issues (#209)

Fixes:
- scrolling on iOS - which was unresponsive in some circumstances
- invisible text in 5th line - super weird edge case

Author: exploIF

example/src/App.tsx

@@ -411,6 +411,7 @@ const htmlStyle: HtmlStyle = {
 const styles = StyleSheet.create({
   container: {
     flex: 1,
+    backgroundColor: 'white',
   },
   content: {
     flexGrow: 1,

ios/EnrichedTextInputView.mm

@@ -1091,10 +1091,15 @@ - (void)anyTextMayHaveBeenModified {
   [self tryUpdatingHeight];
   // update active styles as well
   [self tryUpdatingActiveStyles];
+
   // update drawing
-  NSRange wholeRange = NSMakeRange(0, textView.textStorage.string.length);
-  [textView.layoutManager invalidateLayoutForCharacterRange:wholeRange actualCharacterRange:nullptr];
-  [textView.layoutManager invalidateDisplayForCharacterRange:wholeRange];
+   dispatch_async(dispatch_get_main_queue(), ^{
+     NSRange wholeRange = NSMakeRange(0, textView.textStorage.string.length);
+     NSRange actualRange = NSMakeRange(0, 0);
+     [textView.layoutManager invalidateLayoutForCharacterRange:wholeRange actualCharacterRange:&actualRange];
+     [textView.layoutManager ensureLayoutForCharacterRange:actualRange];
+     [textView.layoutManager invalidateDisplayForCharacterRange:wholeRange];
+   });
 }
 
 // MARK: - UITextView delegate methods