Fix analysis warrnings

lib/flutter_quill.dart

@@ -1,5 +1,7 @@
 library flutter_quill;
 
+export 'src/extensions/localizations.dart';
+export 'src/extensions/quill_provider.dart';
 export 'src/models/config/quill_configurations.dart';
 export 'src/models/config/raw_editor/configurations.dart';
 export 'src/models/config/toolbar/base_configurations.dart';
@@ -21,8 +23,6 @@ export 'src/models/structs/vertical_spacing.dart';
 export 'src/models/themes/quill_dialog_theme.dart';
 export 'src/models/themes/quill_icon_theme.dart';
 export 'src/utils/embeds.dart';
-export 'src/extensions/localizations.dart';
-export 'src/extensions/quill_provider.dart';
 export 'src/widgets/controller.dart';
 export 'src/widgets/cursor.dart';
 export 'src/widgets/default_styles.dart';

lib/src/widgets/text_block.dart

@@ -1,12 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 
+import '../extensions/quill_provider.dart';
 import '../models/documents/attribute.dart';
 import '../models/documents/nodes/block.dart';
 import '../models/documents/nodes/line.dart';
 import '../models/structs/vertical_spacing.dart';
 import '../utils/delta.dart';
-import '../extensions/quill_provider.dart';
 import 'box.dart';
 import 'controller.dart';
 import 'cursor.dart';

lib/src/widgets/toolbar/buttons/custom_button.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
-import '../../../models/themes/quill_icon_theme.dart';
 import '../../../extensions/quill_provider.dart';
+import '../../../models/themes/quill_icon_theme.dart';
 import '../../controller.dart';
 import '../base_toolbar.dart';