Bump lints and min SDK (dart-archive/characters#102)

Author: kevmoo

pkgs/characters/.github/workflows/test-package.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        sdk: [dev, stable, 2.19.0]
+        sdk: [dev, stable, 3.4]
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
       - uses: dart-lang/setup-dart@f0ead981b4d9a35b37f30d36160575d60931ec30
@@ -46,7 +46,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        sdk: [dev, stable, 2.19.0]
+        sdk: [dev, stable, 3.4]
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
       - uses: dart-lang/setup-dart@f0ead981b4d9a35b37f30d36160575d60931ec30

pkgs/characters/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 1.3.1-wip
 
 * Fixed README rendering on pub.dev and API docs.
+* Require Dart `^3.4.0`
 
 ## 1.3.0
 

pkgs/characters/lib/src/characters_impl.dart

@@ -2,11 +2,10 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:characters/src/grapheme_clusters/table.dart';
-
 import "characters.dart";
 import "grapheme_clusters/breaks.dart";
 import "grapheme_clusters/constants.dart";
+import 'grapheme_clusters/table.dart';
 
 /// The grapheme clusters of a string.
 ///

pkgs/characters/pubspec.yaml

@@ -9,8 +9,8 @@ topics:
  - unicode
 
 environment:
-  sdk: ">=2.19.0 <4.0.0"
+  sdk: ^3.4.0
 
 dev_dependencies:
-  dart_flutter_team_lints: ^1.0.0
-  test: ^1.16.0
+  dart_flutter_team_lints: ^2.0.0
+  test: ^1.16.6