style(lib): run rustfmt and enforce in CI

src/common/mod.rs

@@ -1,10 +1,10 @@
 macro_rules! ready {
-    ($e:expr) => (
+    ($e:expr) => {
         match $e {
             ::std::task::Poll::Ready(v) => v,
             ::std::task::Poll::Pending => return ::std::task::Poll::Pending,
         }
-    )
+    };
 }
 
 pub(crate) mod drain;
@@ -14,16 +14,11 @@ mod lazy;
 mod never;
 pub(crate) mod task;
 
-pub(crate) use self::exec::{BoxSendFuture, Exec};
 pub use self::exec::Executor;
+pub(crate) use self::exec::{BoxSendFuture, Exec};
 pub(crate) use self::lazy::{lazy, Started as Lazy};
 pub use self::never::Never;
 pub(crate) use self::task::Poll;
 
 // group up types normally needed for `Future`
-pub(crate) use std::{
-    future::Future,
-    marker::Unpin,
-    pin::Pin,
-};
-
+pub(crate) use std::{future::Future, marker::Unpin, pin::Pin};