Update compatibility casts

Author: ethanblake4

lib/src/painting/edge_insets.dart

@@ -270,10 +270,12 @@ class $EdgeInsets implements EdgeInsets, $Instance {
   Rect inflateRect(Rect rect) => $value.inflateRect(rect);
 
   @override
-  RRect deflateRRect(RRect rect) => $value.deflateRRect(rect);
+  // ignore: override_on_non_overriding_member
+  RRect deflateRRect(RRect rect) => ($value as dynamic).deflateRRect(rect);
 
   @override
-  RRect inflateRRect(RRect rect) => $value.inflateRRect(rect);
+  // ignore: override_on_non_overriding_member
+  RRect inflateRRect(RRect rect) => ($value as dynamic).inflateRRect(rect);
 
   @override
   double get left => $value.left;

lib/src/widgets/framework.dart

@@ -565,7 +565,7 @@ class $BuildContext implements BuildContext, $Instance {
   @override
   bool get mounted {
     try {
-      return ($value as dynamic).mounted;
+      return $value.mounted;
     } catch (e) {
       return false;
     }

lib/src/widgets/text.dart

@@ -147,12 +147,11 @@ class $Text implements Text, $Instance {
   TextWidthBasis? get textWidthBasis => $value.textWidthBasis;
 
   @override
-  Color? get selectionColor => ($value as dynamic).selectionColor;
+  Color? get selectionColor => $value.selectionColor;
 
   @override
-  get textScaler => ($value as dynamic).textScaler;
+  TextScaler? get textScaler => $value.textScaler;
 
   @override
-  // ignore: override_on_non_overriding_member
-  String? get semanticsIdentifier => ($value as dynamic).semanticsIdentifier;
+  String? get semanticsIdentifier => $value.semanticsIdentifier;
 }