Deriving `Arbitrary` on a field containing a `Cow<'static, str>` fails.

For example, the following code (using version 1.0.1) fails to compile.

use std::borrow::Cow;

#[derive(arbitrary::Arbitrary)]
pub struct WithACow {
    cow: Cow<'static, str>,
}

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

With the error message

error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
 --> src/main.rs:3:10
  |
3 | #[derive(arbitrary::Arbitrary)]
  |          ^^^^^^^^^^^^^^^^^^^^
  |
note: first, the lifetime cannot outlive the lifetime `'arbitrary` as defined on the impl at 3:10...
 --> src/main.rs:3:10
  |
3 | #[derive(arbitrary::Arbitrary)]
  |          ^^^^^^^^^^^^^^^^^^^^
note: ...so that the expression is assignable
 --> src/main.rs:3:10
  |
3 | #[derive(arbitrary::Arbitrary)]
  |          ^^^^^^^^^^^^^^^^^^^^
  = note: expected `&mut Unstructured<'_>`
             found `&mut Unstructured<'arbitrary>`
  = note: but, the lifetime must be valid for the static lifetime...
note: ...so that the expression is assignable
 --> src/main.rs:3:10
  |
3 | #[derive(arbitrary::Arbitrary)]
  |          ^^^^^^^^^^^^^^^^^^^^
  = note: expected `Cow<'static, _>`
             found `Cow<'_, _>`
  = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)

But something like this does compile:

use std::borrow::Cow;

use arbitrary::Arbitrary;

pub struct WithACow {
    cow: Cow<'static, str>,
}

impl<'a> Arbitrary<'a> for WithACow {
    fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
        Ok(WithACow {
            cow: Arbitrary::arbitrary(u).map(Cow::Owned)?,
        })
    }
}

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

Reproduce the failure using the arbitrary::Arbitrary derive on the WithACow example with Cow<'static, str>, then compare it with the manual Arbitrary implementation shown in the issue. Trace the derive macro entry point and make the example compile while preserving the expected Cow<'static, str> type.