Bump mockito's deps on analyzer and dart_style:

* dart_style only gained support for extensions in 1.3.0.
* analyzer's APIs improved in 0.38.0 allowing "throws when GenerateMocks references a typedef" test to pass (detecting `elementToMock is GenericFunctionTypeElement`).

PiperOrigin-RevId: 293006909
diff --git a/pubspec.yaml b/pubspec.yaml
index 18e9163..e76d7aa 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -12,11 +12,11 @@
   sdk: '>=2.3.0 <3.0.0'
 
 dependencies:
-  analyzer: ^0.37.1
+  analyzer: ^0.38.0
   build: ^1.1.3
   code_builder: ^3.2.0
   collection: ^1.1.0
-  dart_style: ^1.2.5
+  dart_style: ^1.3.0
   matcher: ^0.12.3
   meta: ^1.0.4
   test_api: ^0.2.1