[3.35.1] Fix SDK dependency

Author: den0206

lib/src/decoration/neumorphic_emboss_decoration_painter.dart

@@ -130,6 +130,7 @@ class NeumorphicEmbossDecorationPainter extends BoxPainter {
 
   void _paintShadows(Canvas canvas, Path path) {
     final Matrix4 matrix4 = Matrix4.identity()
+      // ignore: deprecated_member_use
       ..scale(_cache.scaleX, _cache.scaleY);
 
     canvas

lib/src/widget/app_bar.dart

@@ -175,11 +175,12 @@ class NeumorphicAppBarState extends State<NeumorphicAppBar> {
 
     Widget? title = widget.title;
     if (title != null) {
-      final AppBarTheme appBarTheme = AppBarTheme.of(context);
       title = DefaultTextStyle(
-        style: (appBarTheme.titleTextStyle ??
+        style: (AppBarTheme.of(context).titleTextStyle ??
                 Theme.of(context).textTheme.titleMedium!)
-            .merge(widget.textStyle ?? nTheme?.current?.appBarTheme.textStyle),
+            .merge(widget.textStyle ??
+                nTheme?.current?.appBarTheme.textStyle ??
+                const TextStyle()),
         softWrap: false,
         overflow: TextOverflow.ellipsis,
         child: title,