build: increased dart sdk version

MarkOSullivan94 · MarkOSullivan94 · commit 28f715b15f07 · 2024-09-21T15:16:05.000-05:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -16,7 +16,7 @@ dependencies:
   yaml: ^3.1.1
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: ">=3.0.0 <4.0.0"
 
 dev_dependencies:
   # Needed by build_version
