blanket 0.4 + async-trait don't work together

[nwalfield]

blanket 0.4 works with async traits (yay!). Unfortunately, async traits in Rust are still rather limited in functionality so it is often necessary to use the async-trait crate. Unfortunately, blanket does not work with traits that use async-trait. Consider the following code:

trait Foo {
    fn foo();
}

#[blanket::blanket(derive(Box, Mut))]
trait Bar {
    async fn bar();
}

#[blanket::blanket(derive(Box, Mut))]
#[async_trait::async_trait]
trait Xyzzy {
    async fn xyzzy();
}

fn main() {
    println!("Hello, world!");
}

In the Cargo.toml, I have:

[dependencies]
blanket = "0.4"
async-trait = "0.1"

When compiling the above, I get:

$ cargo build
   Compiling async-blanket v0.1.0 (/tmp/async-blanket)
error[E0195]: lifetime parameters or bounds on method `foo` do not match the trait declaration
  --> src/main.rs:13:17
   |
13 |     async fn xyzzy();
   |              ---^-
   |              |  |
   |              |  lifetimes do not match method in trait
   |              lifetimes in impl do not match this method in trait

For more information about this error, try `rustc --explain E0195`.
error: could not compile `async-blanket` (bin "async-blanket") due to 2 previous errors
$ rustc --version
rustc 1.76.0 (07dca489a 2024-02-04)