update a couple more sdk constraints

Author: TimWhiting

packages/custom_lint/example/example_lint/pubspec.yaml

@@ -3,7 +3,7 @@ version: 0.0.4
 publish_to: none
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   analyzer: ^5.0.0

packages/custom_lint/example/pubspec.yaml

@@ -3,7 +3,7 @@ version: 0.0.1
 publish_to: none
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   riverpod: ^2.0.0

packages/custom_lint/test/src/workspace_test.dart

@@ -2075,8 +2075,8 @@ dart pub upgrade dep
             'app2',
             devDependencies: {
               'dep': HostedDependency(
-                version: VersionConstraint.parse('>=2.0.0 <3.0.0'),
-              ),
+                version: VersionConstraint.parse('>=3.0.0 <4.0.0'),
+              )
             },
           ),
         ]);

packages/custom_lint/tools/analyzer_plugin/pubspec.yaml

@@ -4,7 +4,7 @@ version: 0.5.0
 publish_to: none
 
 environment:
-  sdk: ">=3.0.0 <3.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   custom_lint: 0.5.0

packages/custom_lint_builder/example/example_lint/pubspec.yaml

@@ -3,7 +3,7 @@ version: 0.0.4
 publish_to: none
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   analyzer: ^5.0.0

packages/custom_lint_core/test/type_checker_test.dart

@@ -53,7 +53,7 @@ version: 0.2.8
 description: A package to help writing custom linters
 repository: https://github.com/invertase/dart_custom_lint
 environment:
-  sdk: ">=2.17.1 <3.0.0"
+  sdk: ">3.0.0 <4.0.0"
 ''');
 
       await Process.run(