error: future cannot be sent between threads safely
  --> src/main.rs:22:1
   |
22 | #[embassy_executor::main]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `____embassy_main_task` is not `Send`
   |
note: captured value is not `Send`
  --> src/main.rs:23:15
   |
23 | async fn main(_spawner: Spawner) {}
   |               ^^^^^^^^ has type `embassy_executor::Spawner` which is not `Send`
   = note: `*mut ()` doesn't implement `core::marker::Send`
note: captured value is not `Send`
  --> src/main.rs:23:15
   |
23 | async fn main(_spawner: Spawner) {}
   |               ^^^^^^^^ has type `embassy_executor::Spawner` which is not `Send`
   = note: `*mut ()` doesn't implement `core::marker::Sync`
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#future_not_send
   = note: `-D clippy::future-not-send` implied by `-D clippy::nursery`
   = help: to override `-D clippy::nursery` add `#[allow(clippy::future_not_send)]`