Cache problems

[josejachuf]

Hi,

I'm using the github version:

salvo = { git = "https://github.com/salvo-rs/salvo.git", features = ["affix", "jwt-auth", "cache", "session", "cors"] }

This works fine:

```

let cache_20s = Cache::new(
MemoryStore::builder().time_to_live(Duration::from_secs(20)).build(),
RequestIssuer::default(),
);

But if I add another cache I get a mistake


    ```
    let cache_20s = Cache::new(
        MemoryStore::builder().time_to_live(Duration::from_secs(20)).build(),
        RequestIssuer::default(),
    );

    let cache_5s = Cache::new(
        MemoryStore::builder().time_to_live(Duration::from_secs(5)).build(),
        RequestIssuer::default(),
    );

error[E0283]: type annotations needed
--> src/main.rs:54:9
MemoryStore::builder().time_to_live(Duration::from_secs(5)).build(),
| ^^^^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter K declared on the struct MemoryStore

[josejachuf]

I know it is. I was not using the variable declared (cache_5s) anywhere