Make SenderOptions/ReceiverOptions customizer generic

[kitkars]

Try to add this. We get compile time error as it is not generic and it expects SenderOptions<Object, Object>.

    @Bean
    public SenderOptionsCustomizer customizer(){
        return (a, b) -> b.withKeySerializer(new StringSerializer());
    }

even this will not fix.

    @Bean
    public SenderOptionsCustomizer customizer(){
        return (a, b) -> b.withKeySerializer(((Serializer<Object>) new StringSerializer()));
    }

[garyrussell]

@kitkars We've changed the interfaces but please note that the serializers/deserializers can also be set in the application.properties/yml (boot, binder and/or binding configuration in that order).

[kitkars]

Thanks Gary for the quick fix.