Update pubspec.yaml

Author: brianquinlan

pkgs/http_client_conformance_tests/pubspec.yaml

@@ -11,7 +11,7 @@ environment:
 
 dependencies:
   async: ^2.8.2
-  dart_style: ^2.2.3
+  dart_style: ^2.3.7
   http: ^1.2.0
   stream_channel: ^2.1.1
   test: ^1.21.2