Update Loom and make it a dev dependency

Cargo.toml

@@ -21,8 +21,8 @@ keywords = ["async", "channel", "oneshot", "reusable", "futures"]
 [dev-dependencies]
 pollster = "0.3"
 
-[target.'cfg(multishot_loom)'.dependencies]
-loom = "0.5"
+[target.'cfg(multishot_loom)'.dev-dependencies]
+loom = "0.7"
 
 [lints.rust]
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(multishot_loom)'] }

src/loom_exports.rs

@@ -1,21 +1,21 @@
-#[cfg(multishot_loom)]
+#[cfg(all(test, multishot_loom))]
 pub(crate) mod sync {
     pub(crate) mod atomic {
         pub(crate) use loom::sync::atomic::AtomicUsize;
     }
 }
-#[cfg(not(multishot_loom))]
+#[cfg(not(all(test, multishot_loom)))]
 pub(crate) mod sync {
     pub(crate) mod atomic {
         pub(crate) use std::sync::atomic::AtomicUsize;
     }
 }
 
-#[cfg(multishot_loom)]
+#[cfg(all(test, multishot_loom))]
 pub(crate) mod cell {
     pub(crate) use loom::cell::UnsafeCell;
 }
-#[cfg(not(multishot_loom))]
+#[cfg(not(all(test, multishot_loom)))]
 pub(crate) mod cell {
     #[derive(Debug)]
     pub(crate) struct UnsafeCell<T>(std::cell::UnsafeCell<T>);