update dart dependencies

Author: lohanidamodar

templates/dart/pubspec.yaml.twig

@@ -8,9 +8,9 @@ documentation: {{ spec.contactURL }}
 environment:
   sdk: '>=2.17.0 <3.0.0'
 dependencies:
-  http: '>=0.13.6 <1.0.1'
+  http: '>=0.13.6 <1.1.0'
 
 dev_dependencies:
-  lints: ^2.0.1
-  test: ^1.22.0
-  mockito: ^5.4.0
+  lints: ^2.1.1
+  test: ^1.24.6
+  mockito: ^5.4.2