lower bound 3.9

Author: Lyokone

lib/builder.dart

@@ -20,7 +20,7 @@ Builder specBuilder(BuilderOptions options) => _SpecBuilder();
 /// Type checkers for Firebase Functions types.
 /// Using TypeChecker.fromUrl with package URLs pointing to actual source files
 /// (source_gen 4.x compatible).
-class _TypeCheckers {
+abstract class _TypeCheckers {
   static const _pkg = 'package:firebase_functions';
 
   static const httpsNamespace = TypeChecker.fromUrl(

pubspec.yaml

@@ -4,7 +4,7 @@ version: 0.1.0
 repository: https://github.com/invertase/firebase-functions-dart
 
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.9.0
 
 dependencies:
   shelf: ^1.4.2