fix publish warning

yulingtianxia · yulingtianxia · commit 21ec0684c197 · 2022-12-02T00:22:04.000+08:00
diff --git a/dart_native/pubspec.yaml b/dart_native/pubspec.yaml
@@ -10,7 +10,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  ffi: ">=1.1.2"
+  ffi: ">=1.1.2 <3.0.0"
   dart_native_gen: ^0.3.3
 
 dev_dependencies:
