Fix analysis error

lib/src/widgets/raw_editor.dart

@@ -325,6 +325,7 @@ class RawEditorState extends EditorState
 
   TextDirection get _textDirection => Directionality.of(context);
 
+  @override
   void insertContent(KeyboardInsertedContent content) {}
 
   /// Returns the [ContextMenuButtonItem]s representing the buttons in this
@@ -1711,7 +1712,7 @@ class RawEditorState extends EditorState
 }
 
 class _Editor extends MultiChildRenderObjectWidget {
-  _Editor({
+  const _Editor({
     required Key key,
     required List<Widget> children,
     required this.document,

lib/src/widgets/text_block.dart

@@ -596,7 +596,7 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
 }
 
 class _EditableBlock extends MultiChildRenderObjectWidget {
-  _EditableBlock(
+  const _EditableBlock(
       {required this.block,
       required this.textDirection,
       required this.padding,

pubspec.yaml

@@ -6,7 +6,7 @@ homepage: https://bulletjournal.us/home/index.html
 repository: https://github.com/singerdmx/flutter-quill
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
   flutter: ">=3.0.0"
 
 dependencies: