Update pubspec.yaml

Author: jwill

pkgs/jnigen/pubspec.yaml

@@ -21,6 +21,7 @@ topics:
 dependencies:
   args: ^2.5.0
   cli_config: '>=0.1.0 <0.3.0'
+  http: ^1.3.0
   json_annotation: ^4.9.0
   logging: ^1.2.0
   meta: ^1.15.0