Update constructor of RichTextProxy

lib/src/widgets/proxy.dart

@@ -131,16 +131,17 @@ class RenderEmbedProxy extends RenderProxyBox implements RenderContentProxyBox {
 class RichTextProxy extends SingleChildRenderObjectWidget {
   /// Child argument should be an instance of RichText widget.
   const RichTextProxy(
-    RichText child,
-    this.textStyle,
-    this.textAlign,
-    this.textDirection,
-    this.textScaleFactor,
-    this.locale,
-    this.strutStyle,
-    this.textWidthBasis,
-    this.textHeightBehavior,
-  ) : super(child: child);
+      {required RichText child,
+      required this.textStyle,
+      required this.textAlign,
+      required this.textDirection,
+      required this.locale,
+      required this.strutStyle,
+      this.textScaleFactor = 1.0,
+      this.textWidthBasis = TextWidthBasis.parent,
+      this.textHeightBehavior,
+      Key? key})
+      : super(key: key, child: child);
 
   final TextStyle textStyle;
   final TextAlign textAlign;

lib/src/widgets/text_line.dart

@@ -150,15 +150,12 @@ class _TextLineState extends State<TextLine> {
       textScaleFactor: MediaQuery.textScaleFactorOf(context),
     );
     return RichTextProxy(
-        child,
-        textSpan.style!,
-        textAlign,
-        widget.textDirection!,
-        1,
-        Localizations.localeOf(context),
-        strutStyle,
-        TextWidthBasis.parent,
-        null);
+        textStyle: textSpan.style!,
+        textAlign: textAlign,
+        textDirection: widget.textDirection!,
+        strutStyle: strutStyle,
+        locale: Localizations.localeOf(context),
+        child: child);
   }
 
   InlineSpan _getTextSpanForWholeLine(BuildContext context) {