Try to bump min sdk version to dev release

Author: jensjoha

dwds/pubspec.yaml

@@ -7,7 +7,7 @@ description: >-
   service protocol.
 repository: https://github.com/dart-lang/webdev/tree/main/dwds
 environment:
-  sdk: ^3.7.0
+  sdk: ">=3.10.0-149.0.dev <4.0.0"
 
 dependencies:
   async: ^2.9.0

frontend_server_client/pubspec.yaml

@@ -6,7 +6,7 @@ description: >-
 repository: https://github.com/dart-lang/webdev/tree/main/frontend_server_client
 
 environment:
-  sdk: ^3.1.0
+  sdk: ">=3.10.0-149.0.dev <4.0.0"
 
 dependencies:
   async: ^2.5.0