build: update sdk constraint to ^3.8.0

fulleni · fulleni · commit 4f2067ac2f54 · 2025-06-08T06:34:41.000+01:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -4,7 +4,7 @@ repository: https://github.com/headlines-toolkit/ht-email-repository
 publish_to: none
 
 environment:
-  sdk: ">=3.0.0 <4.0.0"
+  sdk: ^3.8.0
 
 dependencies:
   ht_email_client:
