Increased upper sdk constraint

Bungeefan · Bungeefan · commit b6800995c29d · 2023-06-06T15:38:26.000+02:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.3.0
 repository: https://github.com/Bungeefan/logger
 
 environment:
-  sdk: "^2.12.0"
+  sdk: ">=2.12.0 <4.0.0"
 
 dev_dependencies:
   test: ^1.16.8
