feat: bump dart version and various fixes

- bump dart version to >=3.0
- fix analysis_options depreciations
- fix bin filename
- apply dart fixes

analysis_options.yaml

@@ -4,9 +4,7 @@ analyzer:
   language:
     strict-inference: true
     strict-raw-types: true
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+    strict-casts: true
   exclude:
     # Build
     - "**/build/**"
@@ -72,11 +70,10 @@ linter:
     - file_names
     - hash_and_equals
     - implementation_imports
-    - iterable_contains_unrelated_type
+    - collection_methods_unrelated_type
     - join_return_with_assignment
     - library_names
     - library_prefixes
-    - list_remove_unrelated_type
     - literal_only_boolean_expressions
     - no_adjacent_strings_in_list
     - no_duplicate_case_values
@@ -100,7 +97,6 @@ linter:
     - prefer_const_literals_to_create_immutables
     - prefer_constructors_over_static_methods
     - prefer_contains
-    - prefer_equal_for_default_values
     - prefer_final_fields
     - prefer_final_in_for_each
     - prefer_final_locals
@@ -158,4 +154,4 @@ linter:
     - use_string_buffers
     - use_to_and_as_if_applicable
     - valid_regexps
-    - void_checks
+    - void_checks

example/flutter_usage/lib/main.dart

@@ -2,26 +2,30 @@ import 'package:flutter/material.dart';
 
 import 'ui/icons.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) => MaterialApp(
         title: 'Flutter Demo',
         theme: ThemeData(primarySwatch: Colors.blue),
-        home: MyHomePage(),
+        home: const MyHomePage(),
       );
 }
 
 class MyHomePage extends StatelessWidget {
+  const MyHomePage({super.key});
+
   @override
   Widget build(BuildContext context) => Scaffold(
         appBar: AppBar(
-          title: Text('Icons view test'),
+          title: const Text('Icons view test'),
         ),
         body: Padding(
-          padding: EdgeInsets.all(16),
+          padding: const EdgeInsets.all(16),
           child: Column(
             children: [
               UiIcons.account,
@@ -30,7 +34,7 @@ class MyHomePage extends StatelessWidget {
               UiIcons.arrowRight,
             ]
                 .map((iconData) => Padding(
-                      padding: EdgeInsets.all(16),
+                      padding: const EdgeInsets.all(16),
                       child: Icon(iconData),
                     ))
                 .cast<Widget>()

lib/src/otf/io.dart

@@ -15,8 +15,7 @@ OpenTypeFont readFromFile(String path) =>
 
 /// Writes OpenType font to a file.
 void writeToFile(String path, OpenTypeFont font) {
-  final file = File(path);
-  file.createSync(recursive: true);
+  final file = File(path)..createSync(recursive: true);
   final byteData = OTFWriter().write(font);
   final extension = p.extension(file.path).toLowerCase();