fix: Field equality factors in inline serializer

lib/typed/field.rb

@@ -37,7 +37,8 @@ def initialize(name:, type:, required: true, inline_serializer: nil)
     def ==(other)
       name == other.name &&
         type == other.type &&
-        required == other.required
+        required == other.required &&
+        inline_serializer == other.inline_serializer
     end
 
     sig { returns(T::Boolean) }